# grid_transformation

auth_name: EPSG
name: Guam 1963 to NAD83(HARN) (1)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: guhpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: guhpgn.los
operation_version: NGS-Gum
description:
NADCON method which expects longitudes positive west; EPSG GeogCRSs Guam 1963 and NAD83(HARN) (codes 4675 and 4152) have longitudes positive east. Can be used as approximation for tfm between Guam 1963 and WGS 84 - see tfm code 1069.


auth_name: EPSG
name: Guam 1963 to WGS 84 (2)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: guhpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: guhpgn.los
operation_version: EPSG-Gum
description:
Parameter files are from Guam 1963 to NAD83(HARN) (1) (code 1068), but for many purposes NAD83(HARN) can be considered to be coincident with WGS 84 within the accuracy of the transformation.


auth_name: EPSG
name: NAD27 to NAD83 (1)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: conus.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: conus.los
operation_version: NGS-Usa Conus
description:
Uses NADCON method which expects longitudes positive west; EPSG GeogCRS NAD27 (code 4267) and NAD83 (code 4269) have longitudes positive east. For application in Gulf of Mexico refer to IOGP report 373-26.


auth_name: EPSG
name: NAD27 to NAD83 (2)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: alaska.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: alaska.los
operation_version: NGS-Usa AK
description:
Uses NADCON method which expects longitudes positive west; EPSG GeogCRS NAD27 (code 4267) and NAD83 (code 4269) have longitudes positive east. May be used as transformation to WGS 84 - see NAD27 to WGS 84 (85) (code 15864).


auth_name: EPSG
name: RGNC91-93 to NEA74 Noumea (4)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: RGNC1991_NEA74Noumea.gsb
operation_version: ESRI-Ncl 0.05m
description:
Emulation using NTv2 method of tfm NEA74 Noumea to RGNC91-93 (3) (code 15943). Note reversal of sign of parameter values in grid file.


auth_name: EPSG
name: NAD27 to NAD83 (3)
method_auth_name: EPSG
method_name: NTv1
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: NTv1_0.gsb
operation_version: GC-Can NT1
description:
Uses NTv1 method. Replaced in Quebec by code 1462 and elsewhere in 1997 by NTv2 (transformation code 1313). Input expects longitudes to be positive west; EPSG GeogCRS NAD27 (code 4267) and NAD83 (code 4269) have longitudes positive east.


auth_name: EPSG
name: NAD27 to NAD83 (4)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: NTv2_0.gsb
operation_version: GC-Can NT2
description:
Uses NTv2 data files. Replaces NTv1 (transformation code 1312) except in Quebec. Input expects longitudes to be positive west; EPSG GeogCRS NAD27 (code 4267) and (code 4269) have longitudes positive east. May be used as tfm to WGS 84 - see code 1693.


auth_name: EPSG
name: NAD27(CGQ77) to NAD83 (1)
method_auth_name: EPSG
method_name: NTv1
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: PQV4.DAC
operation_version: SGQ-Can QC NT1
description:
Replaced by NAD27(CGQ77) to NAD83 (2) (code 1575). Uses NT method which expects longitudes positive west; EPSG GeogCRSs CGQ77 (code 4609) and NAD83 (code 4269) have longitudes positive east.


auth_name: EPSG
name: Old Hawaiian to NAD83 (1)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: hawaii.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: hawaii.los
operation_version: NGS-Usa HI
description:
Accuracy 0.2m at 67% confidence level. Uses NADCON method which expects longitudes positive west; source and target CRSs have longitudes positive east. NADCON converts from Old Hawaiian Datum but makes the transformation appear to be from NAD27.


auth_name: EPSG
name: St. Lawrence Island to NAD83 (1)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: stlrnc.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: stlrnc.los
operation_version: NGS-Usa AK StL
description:
Accuracy 0.5m at 67% confidence level. Uses NADCON method which expects longitudes positive west; source and target CRSs have longitudes positive east. NADCON data converts from St. Lawrence Datum but makes the transformation appear to be from NAD27.


auth_name: EPSG
name: St. Paul Island to NAD83 (1)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: stpaul.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: stpaul.los
operation_version: NGS-Usa AK StP
description:
Accuracy 0.5m at 67% confidence level. Uses NADCON method which expects longitudes positive west; source and target CRSs have longitudes positive east. NADCON converts from St. Paul Datum but makes the transformation appear to be from NAD27.


auth_name: EPSG
name: St. George Island to NAD83 (1)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: stgeorge.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: stgeorge.los
operation_version: NGS-Usa AK StG
description:
Accuracy 0.5m at 67% confidence level. Uses NADCON method which expects longitudes positive west; source and target CRSs have longitudes positive east. NADCON converts from St. George Datum but makes the transformation appear to be from NAD27.


auth_name: EPSG
name: Puerto Rico to NAD83 (1)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: prvi.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: prvi.los
operation_version: NGS-PRVI
description:
Accuracy 0.05m at 67% confidence level. May be taken as approximate transformation Puerto Rico-WGS 84 - see code 15841.


auth_name: EPSG
name: NAD27 to NAD83 (5)
method_auth_name: EPSG
method_name: NTv1
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: GS2783v1.QUE
operation_version: SGQ-Can QC NT1
description:
Densification for Quebec of code 1312. Replaced by NAD27 to NAD83 (6) (code 1573). Uses NT method which expects longitudes positive west; EPSG GeogCRSs NAD27 (code 4267) and NAD83 (code 4269) have longitudes positive east.


auth_name: EPSG
name: NAD27(76) to NAD83 (1)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: May76v20.gsb
operation_version: SGQ-Can Ont
description:
Uses NT method which expects longitudes positive west; EPSG GeogCRSs NAD27(76) (code 4608) and NAD83 (code 4269) have longitudes positive east. May be taken as approximate transformation NAD27(76) to WGS 84 - see code 1690.


auth_name: EPSG
name: AGD66 to GDA94 (5)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: vic_0799.gsb
operation_version: OSG-Aus Vic old
description:
Replaced by AGD66 to GDA94 (10) (code 1596) and then by AGD66 to GDA94 (11) (code 1803). Input expects longitudes to be positive west; EPSG GeogCRS AGD66 (code 4202) and GDA94 (code 4283) both have longitudes positive east.


auth_name: EPSG
name: NAD83 to NAD83(HARN) (1)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: alhpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: alhpgn.los
operation_version: NGS-Usa AL
description:
Accuracy 67% confidence level. Uses NADCON method which expects longitudes positive west; EPSG GeogCRSs NAD83 (code 4269) and NAD83(HARN) (code 4152) have longitudes positive east. May be taken as approximate transformation NAD83-WGS 84 - see code 1717.


auth_name: EPSG
name: NAD83 to NAD83(HARN) (2)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: azhpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: azhpgn.los
operation_version: NGS-Usa AZ
description:
Accuracy 67% confidence level. Uses NADCON method which expects longitudes positive west; EPSG GeogCRSs NAD83 (code 4269) and NAD83(HARN) (code 4152) have longitudes positive east. May be taken as approximate transformation NAD83-WGS 84 - see code 1728.


auth_name: EPSG
name: NAD83 to NAD83(HARN) (3)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: cnhpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: cnhpgn.los
operation_version: NGS-Usa CA n
description:
Accuracy 67% confidence level. Uses NADCON method which expects longitudes positive west; EPSG GeogCRSs NAD83 (code 4269) and NAD83(HARN) (code 4152) have longitudes positive east. May be taken as approximate transformation NAD83-WGS 84 - see code 1739.


auth_name: EPSG
name: NAD83 to NAD83(HARN) (4)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: cshpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: cshpgn.los
operation_version: NGS-Usa CA s
description:
Accuracy 67% confidence level. Uses NADCON method which expects longitudes positive west; EPSG GeogCRSs NAD83 (code 4269) and NAD83(HARN) (code 4152) have longitudes positive east. May be taken as approximate transformation NAD83-WGS 84 - see code 1750.


auth_name: EPSG
name: NAD83 to NAD83(HARN) (5)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: cohpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: cohpgn.los
operation_version: NGS-Usa CO
description:
Accuracy 67% confidence level. Uses NADCON method which expects longitudes positive west; EPSG GeogCRSs NAD83 (code 4269) and NAD83(HARN) (code 4152) have longitudes positive east. May be taken as approximate transformation NAD83-WGS 84 - see code 1712.


auth_name: EPSG
name: NAD83 to NAD83(HARN) (6)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: gahpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: gahpgn.los
operation_version: NGS-Usa GA
description:
Accuracy 67% confidence level. Uses NADCON method which expects longitudes positive west; EPSG GeogCRSs NAD83 (code 4269) and NAD83(HARN) (code 4152) have longitudes positive east. May be taken as approximate transformation NAD83-WGS 84 - see code 1713.


auth_name: EPSG
name: NAD83 to NAD83(HARN) (7)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: flhpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: flhpgn.los
operation_version: NGS-Usa FL
description:
Accuracy 67% confidence level. Uses NADCON method which expects longitudes positive west; EPSG GeogCRSs NAD83 (code 4269) and NAD83(HARN) (code 4152) have longitudes positive east. May be taken as approximate transformation NAD83-WGS 84 - see code 1714.


auth_name: EPSG
name: NAD83 to NAD83(HARN) (8)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: emhpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: emhpgn.los
operation_version: NGS-Usa ID MT e
description:
Accuracy 67% confidence level. Uses NADCON method which expects longitudes positive west; EPSG GeogCRSs NAD83 (code 4269) and NAD83(HARN) (code 4152) have longitudes positive east. May be taken as approximate transformation NAD83-WGS 84 - see code 1715.


auth_name: EPSG
name: NAD83 to NAD83(HARN) (9)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: wmhpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: wmhpgn.los
operation_version: NGS-Usa ID MT w
description:
Accuracy 67% confidence level. Uses NADCON method which expects longitudes positive west; EPSG GeogCRSs NAD83 (code 4269) and NAD83(HARN) (code 4152) have longitudes positive east. May be taken as approximate transformation NAD83-WGS 84 - see code 1716.


auth_name: EPSG
name: NAD83 to NAD83(HARN) (10)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: kyhpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: kyhpgn.los
operation_version: NGS-Usa KY
description:
Accuracy 67% confidence level. Uses NADCON method which expects longitudes positive west; EPSG GeogCRSs NAD83 (code 4269) and NAD83(HARN) (code 4152) have longitudes positive east. May be taken as approximate transformation NAD83-WGS 84 - see code 1718.


auth_name: EPSG
name: NAD83 to NAD83(HARN) (11)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: lahpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: lahpgn.los
operation_version: NGS-Usa LA
description:
Accuracy 67% confidence level. Uses NADCON method which expects longitudes positive west; EPSG GeogCRSs NAD83 (code 4269) and NAD83(HARN) (code 4152) have longitudes positive east. May be taken as approximate transformation NAD83-WGS 84 - see code 1719.


auth_name: EPSG
name: NAD83 to NAD83(HARN) (12)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: mdhpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: mdhpgn.los
operation_version: NGS-Usa DE MD
description:
Accuracy 67% confidence level. Uses NADCON method which expects longitudes positive west; EPSG GeogCRSs NAD83 (code 4269) and NAD83(HARN) (code 4152) have longitudes positive east. May be taken as approximate transformation NAD83-WGS 84 - see code 1720.


auth_name: EPSG
name: NAD83 to NAD83(HARN) (13)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: mehpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: mehpgn.los
operation_version: NGS-Usa ME
description:
Accuracy 67% confidence level. Uses NADCON method which expects longitudes positive west; EPSG GeogCRSs NAD83 (code 4269) and NAD83(HARN) (code 4152) have longitudes positive east. May be taken as approximate transformation NAD83-WGS 84 - see code 1721.


auth_name: EPSG
name: NAD83 to NAD83(HARN) (14)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: mihpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: mihpgn.los
operation_version: NGS-Usa MI
description:
Accuracy 67% confidence level. Uses NADCON method which expects longitudes positive west; EPSG GeogCRSs NAD83 (code 4269) and NAD83(HARN) (code 4152) have longitudes positive east. May be taken as approximate transformation NAD83-WGS 84 - see code 1722.


auth_name: EPSG
name: NAD83 to NAD83(HARN) (15)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: mshpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: mshpgn.los
operation_version: NGS-Usa MS
description:
Accuracy 67% confidence level. Uses NADCON method which expects longitudes positive west; EPSG GeogCRSs NAD83 (code 4269) and NAD83(HARN) (code 4152) have longitudes positive east. May be taken as approximate transformation NAD83-WGS 84 - see code 1723.


auth_name: EPSG
name: NAD83 to NAD83(HARN) (16)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: nbhpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: nbhpgn.los
operation_version: NGS-Usa NE
description:
Accuracy 67% confidence level. Uses NADCON method which expects longitudes positive west; EPSG GeogCRSs NAD83 (code 4269) and NAD83(HARN) (code 4152) have longitudes positive east. May be taken as approximate transformation NAD83-WGS 84 - see code 1724.


auth_name: EPSG
name: NAD83 to NAD83(HARN) (17)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: nehpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: nehpgn.los
operation_version: NGS-Usa NewEng
description:
Accuracy 67% confidence level. Uses NADCON method which expects longitudes positive west; EPSG GeogCRSs NAD83 (code 4269) and NAD83(HARN) (code 4152) have longitudes positive east. May be taken as approximate transformation NAD83-WGS 84 - see code 1725.


auth_name: EPSG
name: NAD83 to NAD83(HARN) (18)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: nmhpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: nmhpgn.los
operation_version: NGS-Usa NM
description:
Accuracy 67% confidence level. Uses NADCON method which expects longitudes positive west; EPSG GeogCRSs NAD83 (code 4269) and NAD83(HARN) (code 4152) have longitudes positive east. May be taken as approximate transformation NAD83-WGS 84 - see code 1726.


auth_name: EPSG
name: NAD83 to NAD83(HARN) (19)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: nyhpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: nyhpgn.los
operation_version: NGS-Usa NY
description:
Accuracy 67% confidence level. Uses NADCON method which expects longitudes positive west; EPSG GeogCRSs NAD83 (code 4269) and NAD83(HARN) (code 4152) have longitudes positive east. May be taken as approximate transformation NAD83-WGS 84 - see code 1727.


auth_name: EPSG
name: NAD83 to NAD83(HARN) (20)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: ndhpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: ndhpgn.los
operation_version: NGS-Usa ND
description:
Accuracy 67% confidence level. Uses NADCON method which expects longitudes positive west; EPSG GeogCRSs NAD83 (code 4269) and NAD83(HARN) (code 4152) have longitudes positive east. May be taken as approximate transformation NAD83-WGS 84 - see code 1729.


auth_name: EPSG
name: NAD83 to NAD83(HARN) (21)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: okhpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: okhpgn.los
operation_version: NGS-Usa OK
description:
Accuracy 67% confidence level. Uses NADCON method which expects longitudes positive west; EPSG GeogCRSs NAD83 (code 4269) and NAD83(HARN) (code 4152) have longitudes positive east. May be taken as approximate transformation NAD83-WGS 84 - see code 1730.


auth_name: EPSG
name: NAD83 to NAD83(HARN) (22)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: pvhpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: pvhpgn.los
operation_version: NGS-PRVI
description:
Accuracy 67% confidence level. Uses NADCON method which expects longitudes positive west; EPSG GeogCRSs NAD83 (code 4269) and NAD83(HARN) (code 4152) have longitudes positive east. May be taken as approximate transformation NAD83-WGS 84 - see code 1731.


auth_name: EPSG
name: NAD83 to NAD83(HARN) (23)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: sdhpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: sdhpgn.los
operation_version: NGS-Usa SD
description:
Accuracy 67% confidence level. Uses NADCON method which expects longitudes positive west; EPSG GeogCRSs NAD83 (code 4269) and NAD83(HARN) (code 4152) have longitudes positive east. May be taken as approximate transformation NAD83-WGS 84 - see code 1732.


auth_name: EPSG
name: NAD83 to NAD83(HARN) (24)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: tnhpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: tnhpgn.los
operation_version: NGS-Usa TN
description:
Accuracy 67% confidence level. Uses NADCON method which expects longitudes positive west; EPSG GeogCRSs NAD83 (code 4269) and NAD83(HARN) (code 4152) have longitudes positive east. May be taken as approximate transformation NAD83-WGS 84 - see code 1733.


auth_name: EPSG
name: NAD83 to NAD83(HARN) (25)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: ethpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: ethpgn.los
operation_version: NGS-Usa TX e
description:
Accuracy 67% confidence level. Uses NADCON method which expects longitudes positive west; EPSG GeogCRSs NAD83 (code 4269) and NAD83(HARN) (code 4152) have longitudes positive east. May be taken as approximate transformation NAD83-WGS 84 - see code 1734.


auth_name: EPSG
name: NAD83 to NAD83(HARN) (26)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: wthpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: wthpgn.los
operation_version: NGS-Usa TX w
description:
Accuracy 67% confidence level. Uses NADCON method which expects longitudes positive west; EPSG GeogCRSs NAD83 (code 4269) and NAD83(HARN) (code 4152) have longitudes positive east. May be taken as approximate transformation NAD83-WGS 84 - see code 1735.


auth_name: EPSG
name: NAD83 to NAD83(HARN) (27)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: vahpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: vahpgn.los
operation_version: NGS-Usa VA
description:
Accuracy 67% confidence level. Uses NADCON method which expects longitudes positive west; EPSG GeogCRSs NAD83 (code 4269) and NAD83(HARN) (code 4152) have longitudes positive east. May be taken as approximate transformation NAD83-WGS 84 - see code 1736.


auth_name: EPSG
name: NAD83 to NAD83(HARN) (28)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: wohpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: wohpgn.los
operation_version: NGS-Usa OR WA
description:
Accuracy 67% confidence level. Uses NADCON method which expects longitudes positive west; EPSG GeogCRSs NAD83 (code 4269) and NAD83(HARN) (code 4152) have longitudes positive east. May be taken as approximate transformation NAD83-WGS 84 - see code 1737.


auth_name: EPSG
name: NAD83 to NAD83(HARN) (29)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: wihpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: wihpgn.los
operation_version: NGS-Usa WI
description:
Accuracy 67% confidence level. Uses NADCON method which expects longitudes positive west; EPSG GeogCRSs NAD83 (code 4269) and NAD83(HARN) (code 4152) have longitudes positive east. May be taken as approximate transformation NAD83-WGS 84 - see code 1738.


auth_name: EPSG
name: NAD83 to NAD83(HARN) (30)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: wyhpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: wyhpgn.los
operation_version: NGS-Usa WY
description:
Accuracy 67% confidence level. Uses NADCON method which expects longitudes positive west; EPSG GeogCRSs NAD83 (code 4269) and NAD83(HARN) (code 4152) have longitudes positive east. May be taken as approximate transformation NAD83-WGS 84 - see code 1740.


auth_name: EPSG
name: AGD66 to GDA94 (6)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: tas_1098.gsb
operation_version: OSG-Tas 0.1m
description:
Replaced by AGD66 to GDA94 (11) (code 1803). Input expects longitudes to be positive west; EPSG GeogCRS AGD66 (code 4202) and GDA94 (code 4283) both have longitudes positive east.


auth_name: EPSG
name: NAD83 to NAD83(HARN) (31)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: hihpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: hihpgn.los
operation_version: NGS-Usa HI
description:
Uses NADCON method which expects longitudes positive west; EPSG GeogCRSs NAD83 (code 4269) and NAD83(HARN) (code 4152) have longitudes positive east. May be taken as approximate transformation NAD83-WGS 84 - see code 1741.


auth_name: EPSG
name: NAD83 to NAD83(HARN) (32)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: inhpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: inhpgn.los
operation_version: NGS-Usa IN
description:
Uses NADCON method which expects longitudes positive west; EPSG GeogCRSs NAD83 (code 4269) and NAD83(HARN) (code 4152) have longitudes positive east. May be taken as approximate transformation NAD83-WGS 84 - see code 1742.


auth_name: EPSG
name: NAD83 to NAD83(HARN) (33)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: kshpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: kshpgn.los
operation_version: NGS-Usa KS
description:
Uses NADCON method which expects longitudes positive west; EPSG GeogCRSs NAD83 (code 4269) and NAD83(HARN) (code 4152) have longitudes positive east. May be taken as approximate transformation NAD83-WGS 84 - see code 1743.


auth_name: EPSG
name: NAD83 to NAD83(HARN) (34)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: nvhpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: nvhpgn.los
operation_version: NGS-Usa NV
description:
Uses NADCON method which expects longitudes positive west; EPSG GeogCRSs NAD83 (code 4269) and NAD83(HARN) (code 4152) have longitudes positive east. May be taken as approximate transformation NAD83-WGS 84 - see code 1744.


auth_name: EPSG
name: NAD83 to NAD83(HARN) (35)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: ohhpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: ohhpgn.los
operation_version: NGS-Usa OH
description:
Uses NADCON method which expects longitudes positive west; EPSG GeogCRSs NAD83 (code 4269) and NAD83(HARN) (code 4152) have longitudes positive east. May be taken as approximate transformation NAD83-WGS 84 - see code 1745.


auth_name: EPSG
name: NAD83 to NAD83(HARN) (36)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: uthpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: uthpgn.los
operation_version: NGS-Usa UT
description:
Uses NADCON method which expects longitudes positive west; EPSG GeogCRSs NAD83 (code 4269) and NAD83(HARN) (code 4152) have longitudes positive east. May be taken as approximate transformation NAD83-WGS 84 - see code 1746.


auth_name: EPSG
name: NAD83 to NAD83(HARN) (37)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: wvhpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: wvhpgn.los
operation_version: NGS-Usa WV
description:
Uses NADCON method which expects longitudes positive west; EPSG GeogCRSs NAD83 (code 4269) and NAD83(HARN) (code 4152) have longitudes positive east. May be taken as approximate transformation NAD83-WGS 84 - see code 1747.


auth_name: EPSG
name: NAD83 to NAD83(HARN) (38)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: ilhpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: ilhpgn.los
operation_version: NGS-Usa IL
description:
Uses NADCON method which expects longitudes positive west; EPSG GeogCRSs NAD83 (code 4269) and NAD83(HARN) (code 4152) have longitudes positive east. May be taken as approximate transformation NAD83-WGS 84 - see code 1748.


auth_name: EPSG
name: NAD83 to NAD83(HARN) (39)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: njhpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: njhpgn.los
operation_version: NGS-Usa NJ
description:
Uses NADCON method which expects longitudes positive west; EPSG GeogCRSs NAD83 (code 4269) and NAD83(HARN) (code 4152) have longitudes positive east. May be taken as approximate transformation NAD83-WGS 84 - see code 1749.


auth_name: EPSG
name: AGD84 to GDA94 (3)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: wa_0400.gsb
operation_version: DOLA-Aus WA 0.1m old
description:
Withdrawn and replaced by AGD84 to GDA94 (4) (code 1593) due to binary file format error. Input expects longitudes to be positive west; EPSG GeogCRS AGD84 (code 4203) and GDA94 (code 4283) have longitudes positive east.


auth_name: EPSG
name: NZGD49 to NZGD2000 (3)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: nzgd2kgrid0005.gsb
operation_version: OSG-Nzl 1m
description:
These same parameter values may be used to transform to WGS 84 - see NZGD49 to WGS 84 (4) (code 1670).


auth_name: EPSG
name: NAD83 to NAD83(CSRS98) (1)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: NAD83-98.gsb
operation_version: SGQ-Can QC
description:
Uses NT method which expects longitudes positive west; EPSG GeogCRSs NAD83 (code 4269) and NAD83(CSRS98) (code 4140) have longitudes positive east. Can be taken as an approximate transformation NAD83 to WGS 84 - see code 1696.


auth_name: EPSG
name: NAD27 to NAD83 (6)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: NA27NA83.GSB
operation_version: SGQ-Can QC NT2
description:
Also distributed with file name QUE27-83.gsb. Replaces NAD27 to NAD83 (5) (code 1462). Uses NT method which expects longitudes positive west; EPSG GeogCRSs NAD27 (code 4267) and NAD83 (code 4269) have longitudes positive east.


auth_name: EPSG
name: NAD27 to NAD83(CSRS98) (1)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: QUE27-98.gsb
operation_version: SGQ-Can QC
description:
Uses NT method which expects longitudes positive west; EPSG GeogCRSs NAD27 (code 4267) and NAD83(CSRS98) (code 4140) have longitudes positive east. Can be taken as an approximate transformation NAD27 to WGS 84 - see code 1692.


auth_name: EPSG
name: NAD27(CGQ77) to NAD83 (2)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: CQ77NA83.GSB
operation_version: SGQ-Can QC NT2
description:
Replaces NAD27(CGQ77) to NAD83 (1) (code 1451). Can be taken as approx transformation to WGS 84 - see code 1691.


auth_name: EPSG
name: NAD27(CGQ77) to NAD83(CSRS98) (1)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: CGQ77-98.gsb
operation_version: SGQ-Can QC
description:
Uses NT method which expects longitudes positive west; EPSG GeogCRSs NAD27(CGQ77) (code 4609) and NAD83(CSRS98) (code 4140) have 1691longitudes positive east. Can be taken as an approximate transformation NAD27(CGQ77) to WGS 84 - see code 1691.


auth_name: EPSG
name: American Samoa 1962 to NAD83(HARN) (1)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: wshpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: wshpgn.los
operation_version: NGS-Asm W
description:
NADCON method which expects longitudes positive west; EPSG GeogCRSs American Samoa 1962 and NAD83(HARN) (codes 4169 and 4152) have longitudes positive east. NADCON expects latitudes in northern hemisphere and values must be made positive prior to input.


auth_name: EPSG
name: AGD84 to GDA94 (4)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: wa_0700.gsb
operation_version: DOLA-Aus WA 0.1m
description:
Replaces AGD84 to GDA94 (3) (code 1559) and then replaced by AGD84 to GDA94 (5) (code 1804). Input expects longitudes to be positive west; EPSG GeogCRS AGD84 (code 4203) and GDA94 (code 4283) both have longitudes positive east.


auth_name: EPSG
name: AGD66 to GDA94 (10)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: SEAust_21_06_00.gsb
operation_version: OSG-Aus SE 0.1m
description:
Replaces AGD66 to GDA94 (5) (code 1464). Replaced by AGD66 to GDA94 (11) (code 1803). Input expects longitudes to be positive west; EPSG GeogCRS AGD66 (code 4202) and GDA94 (code 4283) both have longitudes positive east.


auth_name: EPSG
name: NAD83 to NAD83(CSRS98) (3)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: AB_CSRS.DAC
operation_version: AB Env-Can AB
description:
This gridded difference file AB_CSRS.DAC will need to be renamed to AB_CSRS.gsb to run in some software suites. Formats identical, but AB file is provincial fit only.


auth_name: EPSG
name: NZGD49 to WGS 84 (3)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: nzgd2kgrid0005.gsb
operation_version: EPSG-Nzl 1m
description:
Parameter file is from NZGD49 to NZGD2000 (3) (code 1568) and assumes WGS 84 is coincident with NZGD2000 to the accuracy of the transformation.


auth_name: EPSG
name: ATS77 to WGS 84 (1)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: NB7783v2.gsb
operation_version: EPSG-Can NB
description:
Parameter file is from ATS77 to NAD83(CSRS)v2 (1) (code 9237) assuming that NAD83(CSRS)v2 is equivalent to WGS 84 within the accuracy of the transformation.


auth_name: EPSG
name: ATS77 to WGS 84 (2)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: PE7783V2.gsb
operation_version: EPSG-Can PEI
description:
Parameter file is from ATS77 to NAD83(CSRS)v2 (2) (code 9236) assuming that NAD83(CSRS)v2 is equivalent to WGS 84 within the accuracy of the transformation.


auth_name: EPSG
name: NAD27(76) to WGS 84 (1)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: May76v20.gsb
operation_version: EPSG-Can On
description:
Parameter file is from NAD27(76) to NAD83 (1) (code 1463) assuming that NAD83 is equivalent to WGS 84 within the accuracy of the transformation.


auth_name: EPSG
name: NAD27(CGQ77) to WGS 84 (3)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: CQ77NA83.GSB
operation_version: EPSG-Can Qc NT2
description:
Parameter file is from NAD27(CGQ77) to NAD83 (2) (code 1575) assuming that NAD83(CSRS)v2 is equivalent to WGS 84 within the accuracy of the transformation.


auth_name: EPSG
name: NAD27 to WGS 84 (34)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: NA27SCRS.GSB
operation_version: EPSG-Can QC
description:
Parameter file is from NAD27 to NAD83(CSRS)v2 (1) (code 9239) assuming that NAD83(CSRS)v2 is equivalent to WGS 84 within the accuracy of the transformation. Also distributed as QUE27-98.gsb.


auth_name: EPSG
name: NAD27 to WGS 84 (33)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: NTv2_0.gsb
operation_version: EPSG-Can
description:
Parameter file is from NAD27 to NAD83 (4) (code 1313) assuming that NAD83 is equivalent to WGS 84 within the accuracy of the transformation.


auth_name: EPSG
name: American Samoa 1962 to WGS 84 (2)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: wshpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: wshpgn.los
operation_version: EPSG-Asm W
description:
Parameter files are from American Samoa 1962 to NAD83(HARN) (1) (code 1578), but for many purposes NAD83(HARN) can be considered to be coincident with WGS 84 within the accuracy of the transformation.


auth_name: EPSG
name: American Samoa 1962 to WGS 84 (3)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: eshpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: eshpgn.los
operation_version: EPSG-Asm E
description:
Parameter files are from American Samoa 1962 to NAD83(HARN) (2) (code 1579), but for many purposes NAD83(HARN) can be considered to be coincident with WGS 84 within the accuracy of the transformation.


auth_name: EPSG
name: NAD83 to WGS 84 (6)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: NA83SCRS.GSB
operation_version: EPSG-Can QC
description:
Parameter file is from NAD83 to NAD83(CSRS)v2 (1) (code 9241) assuming that NAD83(CSRS)v2 is equivalent to WGS 84 within the accuracy of the transformation. Also distributed with file name NAD83-98.gsb.


auth_name: EPSG
name: NAD83 to WGS 84 (7)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: SK83-98.gsb
operation_version: EPSG-Can SK
description:
Parameter file is from NAD83 to NAD83(CSRS)v2 (2) (code 9887) assuming that NAD83(CSRS)v2 is equivalent to WGS 84 within the accuracy of the transformation.


auth_name: EPSG
name: St. George Island to WGS 84 (1)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: stgeorge.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: stgeorge.los
operation_version: EPSG-Usa AK StG
description:
Parameter files are from St. George Island to NAD83 (1) (code 1457) assuming that NAD83 is equivalent to WGS 84 within the accuracy of the transformation.


auth_name: EPSG
name: St. Lawrence Island to WGS 84 (1)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: stlrnc.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: stlrnc.los
operation_version: EPSG-Usa AK StL
description:
Parameter files are from St. Lawrence Island to NAD83 (1) (code 1455) assuming that NAD83 is equivalent to WGS 84 within the accuracy of the transformation.


auth_name: EPSG
name: St. Paul Island to WGS 84 (1)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: stpaul.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: stpaul.los
operation_version: EPSG-Usa AK StP
description:
Parameter files are from St. Paul Island to NAD83 (1) (code 1456) assuming that NAD83 is equivalent to WGS 84 within the accuracy of the transformation.


auth_name: EPSG
name: NAD83 to WGS 84 (8)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: AB_CSRS.DAC
operation_version: EPSG-Can AB
description:
Parameter file is from NAD83 to NAD83(CSRS)v4 (3) (code 9244) assuming that NAD83(CSRS)v4 is equivalent to WGS 84 within the accuracy of the transformation. This file AB_CSRS.DAC will need to be renamed to AB_CSRS.gsb to run in some software.


auth_name: EPSG
name: NAD27 to WGS 84 (32)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: SK27-98.gsb
operation_version: EPSG-Can SK
description:
Parameter file is from NAD27 to NAD83(CSRS)v2 (2) (code 9886) assuming that NAD83(CSRS)v2 is equivalent to WGS 84 within the accuracy of the transformation.


auth_name: EPSG
name: NAD83 to NAD83(HARN) (40)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: arhpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: arhpgn.los
operation_version: NGS-Usa AR
description:
Uses NADCON method which expects longitudes positive west; EPSG GeogCRSs NAD83 (code 4269) and NAD83(HARN) (code 4152) have longitudes positive east. May be taken as approximate transformation NAD83-WGS 84 - see code 1708.


auth_name: EPSG
name: NAD83 to NAD83(HARN) (41)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: iahpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: iahpgn.los
operation_version: NGS-Usa IA
description:
Uses NADCON method which expects longitudes positive west; EPSG GeogCRSs NAD83 (code 4269) and NAD83(HARN) (code 4152) have longitudes positive east. May be taken as approximate transformation NAD83-WGS 84 - see code 1709.


auth_name: EPSG
name: NAD83 to NAD83(HARN) (42)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: mnhpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: mnhpgn.los
operation_version: NGS-Usa MN
description:
Uses NADCON method which expects longitudes positive west; EPSG GeogCRSs NAD83 (code 4269) and NAD83(HARN) (code 4152) have longitudes positive east. May be taken as approximate transformation NAD83-WGS 84 - see code 1710.


auth_name: EPSG
name: NAD83 to NAD83(HARN) (43)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: mohpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: mohpgn.los
operation_version: NGS-Usa MO
description:
Uses NADCON method which expects longitudes positive west; EPSG GeogCRSs NAD83 (code 4269) and NAD83(HARN) (code 4152) have longitudes positive east. May be taken as approximate transformation NAD83-WGS 84 - see code 1711.


auth_name: EPSG
name: NAD83 to WGS 84 (12)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: arhpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: arhpgn.los
operation_version: EPSG-USA Ar
description:
Parameter files are from NAD83 to NAD83(HARN) (40) (code 1704) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.


auth_name: EPSG
name: NAD83 to WGS 84 (13)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: iahpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: iahpgn.los
operation_version: EPSG-Usa IA
description:
Parameter files are from NAD83 to NAD83(HARN) (41) (code 1705) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.


auth_name: EPSG
name: NAD83 to WGS 84 (14)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: mnhpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: mnhpgn.los
operation_version: EPSG-Usa MN
description:
Parameter files are from NAD83 to NAD83(HARN) (42) (code 1706) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.


auth_name: EPSG
name: NAD83 to WGS 84 (15)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: mohpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: mohpgn.los
operation_version: EPSG-Usa MO
description:
Parameter files are from NAD83 to NAD83(HARN) (43) (code 1707) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.


auth_name: EPSG
name: NAD83 to WGS 84 (16)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: cohpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: cohpgn.los
operation_version: EPSG-Usa CO
description:
Parameter files are from NAD83 to NAD83(HARN) (5) (code 1478) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.


auth_name: EPSG
name: NAD83 to WGS 84 (17)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: gahpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: gahpgn.los
operation_version: EPSG-Usa GA
description:
Parameter files are from NAD83 to NAD83(HARN) (6) (code 1479) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.


auth_name: EPSG
name: NAD83 to WGS 84 (18)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: flhpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: flhpgn.los
operation_version: EPSG-Usa FL
description:
Parameter files are from NAD83 to NAD83(HARN) (7) (code 1480) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.


auth_name: EPSG
name: NAD83 to WGS 84 (19)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: emhpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: emhpgn.los
operation_version: EPSG-Usa ID MT e
description:
Parameter files are from NAD83 to NAD83(HARN) (8) (code 1481) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.


auth_name: EPSG
name: NAD83 to WGS 84 (20)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: wmhpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: wmhpgn.los
operation_version: EPSG-Usa ID MT w
description:
Parameter files are from NAD83 to NAD83(HARN) (9) (code 1482) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.


auth_name: EPSG
name: NAD83 to WGS 84 (21)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: alhpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: alhpgn.los
operation_version: EPSG-Usa AL
description:
Parameter files are from NAD83 to NAD83(HARN) (1) (code 1474) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.


auth_name: EPSG
name: NAD83 to WGS 84 (22)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: kyhpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: kyhpgn.los
operation_version: EPSG-Usa KY
description:
Parameter files are from NAD83 to NAD83(HARN) (10) (code 1483) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.


auth_name: EPSG
name: NAD83 to WGS 84 (23)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: lahpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: lahpgn.los
operation_version: EPSG-Usa LA
description:
Parameter files are from NAD83 to NAD83(HARN) (11) (code 1484) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.


auth_name: EPSG
name: NAD83 to WGS 84 (24)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: mdhpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: mdhpgn.los
operation_version: EPSG-Usa DE MD
description:
Parameter files are from NAD83 to NAD83(HARN) (12) (code 1485) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.


auth_name: EPSG
name: NAD83 to WGS 84 (25)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: mehpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: mehpgn.los
operation_version: EPSG-Usa ME
description:
Parameter files are from NAD83 to NAD83(HARN) (13) (code 1486) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.


auth_name: EPSG
name: NAD83 to WGS 84 (26)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: mihpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: mihpgn.los
operation_version: EPSG-Usa MI
description:
Parameter files are from NAD83 to NAD83(HARN) (14) (code 1487) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.


auth_name: EPSG
name: NAD83 to WGS 84 (27)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: mshpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: mshpgn.los
operation_version: EPSG-Usa MS
description:
Parameter files are from NAD83 to NAD83(HARN) (15) (code 1488) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.


auth_name: EPSG
name: NAD83 to WGS 84 (28)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: nbhpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: nbhpgn.los
operation_version: EPSG-Usa NE
description:
Parameter files are from NAD83 to NAD83(HARN) (16) (code 1489) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.


auth_name: EPSG
name: NAD83 to WGS 84 (29)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: nehpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: nehpgn.los
operation_version: EPSG-Usa NewEng
description:
Parameter files are from NAD83 to NAD83(HARN) (17) (code 1490) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.


auth_name: EPSG
name: NAD83 to WGS 84 (30)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: nmhpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: nmhpgn.los
operation_version: EPSG-Usa NM
description:
Parameter files are from NAD83 to NAD83(HARN) (18) (code 1491) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.


auth_name: EPSG
name: NAD83 to WGS 84 (31)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: nyhpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: nyhpgn.los
operation_version: EPSG-Usa NY
description:
Parameter files are from NAD83 to NAD83(HARN) (19) (code 1492) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.


auth_name: EPSG
name: NAD83 to WGS 84 (32)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: azhpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: azhpgn.los
operation_version: EPSG-Usa AZ
description:
Parameter files are from NAD83 to NAD83(HARN) (2) (code 1475) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.


auth_name: EPSG
name: NAD83 to WGS 84 (33)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: ndhpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: ndhpgn.los
operation_version: EPSG-Usa ND
description:
Parameter files are from NAD83 to NAD83(HARN) (20) (code 1493) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.


auth_name: EPSG
name: NAD83 to WGS 84 (34)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: okhpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: okhpgn.los
operation_version: EPSG-Usa OK
description:
Parameter files are from NAD83 to NAD83(HARN) (21) (code 1494) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.


auth_name: EPSG
name: NAD83 to WGS 84 (35)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: pvhpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: pvhpgn.los
operation_version: EPSG-PRVI
description:
Parameter files are from NAD83 to NAD83(HARN) (22) (code 1495) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.


auth_name: EPSG
name: NAD83 to WGS 84 (36)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: sdhpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: sdhpgn.los
operation_version: EPSG-Usa SD
description:
Parameter files are from NAD83 to NAD83(HARN) (23) (code 1496) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.


auth_name: EPSG
name: NAD83 to WGS 84 (37)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: tnhpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: tnhpgn.los
operation_version: EPSG-Usa TN
description:
Parameter files are from NAD83 to NAD83(HARN) (24) (code 1497) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.


auth_name: EPSG
name: NAD83 to WGS 84 (38)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: ethpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: ethpgn.los
operation_version: EPSG-Usa TX e
description:
Parameter files are from NAD83 to NAD83(HARN) (25) (code 1498) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.


auth_name: EPSG
name: NAD83 to WGS 84 (39)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: wthpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: wthpgn.los
operation_version: EPSG-Usa TX w
description:
Parameter files are from NAD83 to NAD83(HARN) (26) (code 1499) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.


auth_name: EPSG
name: NAD83 to WGS 84 (40)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: vahpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: vahpgn.los
operation_version: EPSG-Usa VA
description:
Parameter files are from NAD83 to NAD83(HARN) (27) (code 1500) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.


auth_name: EPSG
name: NAD83 to WGS 84 (41)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: wohpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: wohpgn.los
operation_version: EPSG-Usa OR WA
description:
Parameter files are from NAD83 to NAD83(HARN) (28) (code 1501) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.


auth_name: EPSG
name: NAD83 to WGS 84 (42)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: wihpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: wihpgn.los
operation_version: EPSG-Usa WI
description:
Parameter files are from NAD83 to NAD83(HARN) (29) (code 1502) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.


auth_name: EPSG
name: NAD83 to WGS 84 (43)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: cnhpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: cnhpgn.los
operation_version: EPSG-Usa CA n
description:
Parameter files are from NAD83 to NAD83(HARN) (3) (code 1476) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.


auth_name: EPSG
name: NAD83 to WGS 84 (44)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: wyhpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: wyhpgn.los
operation_version: EPSG-Usa WY
description:
Parameter files are from NAD83 to NAD83(HARN) (30) (code 1503) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.


auth_name: EPSG
name: NAD83 to WGS 84 (45)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: hihpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: hihpgn.los
operation_version: EPSG-Usa HI
description:
Parameter files are from NAD83 to NAD83(HARN) (31) (code 1520) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.


auth_name: EPSG
name: NAD83 to WGS 84 (46)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: inhpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: inhpgn.los
operation_version: EPSG-Usa IN
description:
Parameter files are from NAD83 to NAD83(HARN) (32) (code 1521) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.


auth_name: EPSG
name: NAD83 to WGS 84 (47)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: kshpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: kshpgn.los
operation_version: EPSG-Usa KS
description:
Parameter files are from NAD83 to NAD83(HARN) (33) (code 1522) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.


auth_name: EPSG
name: NAD83 to WGS 84 (48)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: nvhpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: nvhpgn.los
operation_version: EPSG-Usa NV
description:
Parameter files are from NAD83 to NAD83(HARN) (34) (code 1523) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.


auth_name: EPSG
name: NAD83 to WGS 84 (49)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: ohhpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: ohhpgn.los
operation_version: EPSG-Usa OH
description:
Parameter files are from NAD83 to NAD83(HARN) (35) (code 1524) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.


auth_name: EPSG
name: NAD83 to WGS 84 (50)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: uthpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: uthpgn.los
operation_version: EPSG-Usa UT
description:
Parameter files are from NAD83 to NAD83(HARN) (36) (code 1525) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.


auth_name: EPSG
name: NAD83 to WGS 84 (51)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: wvhpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: wvhpgn.los
operation_version: EPSG-Usa WV
description:
Parameter files are from NAD83 to NAD83(HARN) (37) (code 1526) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.


auth_name: EPSG
name: NAD83 to WGS 84 (52)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: ilhpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: ilhpgn.los
operation_version: EPSG-Usa IL
description:
Parameter files are from NAD83 to NAD83(HARN) (38) (code 1553) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.


auth_name: EPSG
name: NAD83 to WGS 84 (53)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: njhpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: njhpgn.los
operation_version: EPSG-Usa NJ
description:
Parameter files are from NAD83 to NAD83(HARN) (39) (code 1554) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.


auth_name: EPSG
name: NAD83 to WGS 84 (54)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: cshpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: cshpgn.los
operation_version: EPSG-Usa CA s
description:
Parameter files are from NAD83 to NAD83(HARN) (4) (code 1477) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.


auth_name: EPSG
name: NAD83 to NAD83(CSRS98) (3)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: AB_CSRS.DAC
operation_version: AB Env-Can AB
description:
This gridded difference file AB_CSRS.DAC will need to be renamed to AB_CSRS.gsb to run in some software suites. Formats identical, but AB file is provincial fit only. Can be taken as an approximate transformation NAD83 to WGS 84 - see code 1702.


auth_name: EPSG
name: AGD66 to GDA94 (11)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: A66 National (13.09.01).gsb
operation_version: ICSM-Aus 0.1m
description:
Replaces AGD66 to GDA94 variants 6, 7 and 10 (codes 1506 1507 1596). Input expects longitudes to be positive west; source and target CRSs AGD66 (code 4202) and GDA94 (code 4283) both have longitudes positive east.


auth_name: EPSG
name: AGD84 to GDA94 (5)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: National 84 (02.07.01).gsb
operation_version: Auslig-Aus 0.1m
description:
Replaces AGD84 to GDA94 (4) (code 1593) which itself replaced variant 3 (code 1559). Input expects longitudes to be + west; EPSG GeogCRS AGD84 (code 4203) and GDA94 (code 4283) both have longitudes positive east. May be used as tfm to WGS 84 - see 15785


auth_name: EPSG
name: NAD83 to NAD83(CSRS) (1)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: NAD83-98.gsb
operation_version: SGQ-Can QC
description:
Uses NT method which expects longitudes positive west; EPSG GeogCRSs NAD83 (code 4269) and NAD83(CSRS) (code 4617) have longitudes positive east. Can be taken as an approximate transformation NAD83 to WGS 84 - see code 1696.


auth_name: EPSG
name: NAD27 to NAD83(CSRS) (1)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: QUE27-98.gsb
operation_version: SGQ-Can QC
description:
Uses NT method which expects longitudes positive west; EPSG GeogCRSs NAD27 (code 4267) and NAD83(CSRS) (code 4617) have longitudes positive east. Can be taken as an approximate transformation NAD27 to WGS 84 - see code 1692.


auth_name: EPSG
name: NAD27(CGQ77) to NAD83(CSRS) (1)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: CGQ77-98.gsb
operation_version: SGQ-Can QC
description:
Uses NT method which expects longitudes positive west; EPSG GeogCRSs NAD27(CGQ77) (code 4609) and NAD83(CSRS) (code 4617) have longitudes positive east. Can be taken as an approximate transformation NAD27(CGQ77) to WGS 84 - see code 1691.


auth_name: EPSG
name: ATS77 to WGS 84 (3)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: NS778301.gsb
operation_version: EPSG-Can NS
description:
Parameter file is from ATS77 to NAD83(CSRS)v3 (3) (code 9235) assuming that NAD83(CSRS)v3 is equivalent to WGS 84 within the accuracy of the transformation.


auth_name: EPSG
name: WGS 84 to EGM2008 height (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (EGM2008)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: Und_min2.5x2.5_egm2008_isw=82_WGS84_TideFree.gz
operation_version: NGA-World 2.5min
description:
Replaces WGS 84 to EGM96 height (1) (CT code 15781). Grid spacing is 2.5 arc-minutes. For smaller spacing (in principle more exact) see CT code 3859. For reversible alternative see CT code 9704. An executable using spherical harmonics is also available.


auth_name: EPSG
name: WGS 84 to EGM2008 height (2)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (EGM2008)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: Und_min1x1_egm2008_isw=82_WGS84_TideFree.gz
operation_version: NGA-World 1min
description:
Replaces WGS 84 to EGM96 height (1) (CT code 15781). Grid spacing is 1 arc-minute. For a larger grid spacing (in principle less exact) see CT code 3858. For reversible alternative see CT code 9618. An executable using spherical harmonics is available.


auth_name: EPSG
name: RRAF 1991 to Martinique 1987 height (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (IGN1997)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: ggm00.txt
operation_version: IGN Mtq
description:
May be used for transformations from WGS 84 to IGN 1987. Accuracy at each 0.025 deg x 0.025 degree grid node is given within the geoid model file.


auth_name: EPSG
name: RRAF 1991 to Guadeloupe 1988 height (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (IGN1997)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: ggg00.txt
operation_version: IGN Glp GT
description:
May be used for transformations from WGS 84 to IGN 1988. Accuracy at each 0.025 deg x 0.025 degree grid node is given within the geoid model file.


auth_name: EPSG
name: RRAF 1991 to IGN 1988 MG height (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (IGN1997)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: ggg00_mg.txt
operation_version: IGN Glp MG
description:
May be used for transformations from WGS 84 to IGN 1988 MG. Accuracy at each 0.025 deg x 0.025 degree grid node is given within the geoid model file.


auth_name: EPSG
name: RRAF 1991 to IGN 1988 SM height (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (IGN1997)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: ggg00_sm.txt
operation_version: IGN Glp StM
description:
May be used for transformations from WGS 84 to IGN 1988 SM. Accuracy at each 0.025 deg x 0.025 degree grid node is given within the geoid model file.


auth_name: EPSG
name: RRAF 1991 to IGN 1988 LS height (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (IGN1997)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: ggg00_ls.txt
operation_version: IGN Glp LSt
description:
May be used for transformations from WGS 84 to IGN 1988 LS. Accuracy at each 0.025 deg x 0.025 degree grid node is given within the geoid model file.


auth_name: EPSG
name: RRAF 1991 to IGN 1988 SB height (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (IGN1997)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: ggg00_sb.txt
operation_version: IGN Glp StB
description:
May be used for transformations from WGS 84 to IGN 1988 SB. Accuracy at each 0.025 deg x 0.025 degree grid node is given within the geoid model file.


auth_name: EPSG
name: ETRS89 to Belfast height (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (OSGM02-Ire)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: OSGM02_NI.txt
operation_version: OS-UK NI
description:
May be used for transformations from WGS 84 to Belfast. Replaced by ETRS89 to Belfast height (2) (code 7958).


auth_name: EPSG
name: ETRS89 to Malin Head height (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (OSGM02-Ire)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: OSGM02_RoI.txt
operation_version: OS-Ire
description:
May be used for transformations from WGS 84 to Malin Head. Replaced by ETRS89 to Malin Head height (2) (code 7959).


auth_name: EPSG
name: OSGB36 to ETRS89 (1)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: OSTN02_NTv2.gsb
operation_version: OSGB-UK Gbr02 NT
description:
Approximate alternative to official OSTN02 method (tfm code 7952). Accuracy at 2000 test points compared to OSTN02 (tfm code 1039): latitude 0.5mm av, 17mm max; longitude 0.8mm av, 23mm max. May be taken as approximate CT to WGS 84 - see code 5339.


auth_name: EPSG
name: OSGB36 to WGS 84 (7)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: OSTN02_NTv2.gsb
operation_version: OGP-UK Gbr02 NT
description:
Parameter values taken from OSGB36 to ETRS89 (1) (tfm code 5338) assuming that ETRS89 is coincident with WGS 84 within the accuracy of the tfm.


auth_name: EPSG
name: NGVD29 height to NAVD88 height (1)
method_auth_name: EPSG
method_name: Vertical Offset by Grid Interpolation (VERTCON)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Vertical offset file
grid_name: vertconw.94
operation_version: NGS-US Conus W
description:
Interpolation within the gridded data file may be made using any of the horizontal CRSs NAD27, NAD83 or NAD83(HARN).


auth_name: EPSG
name: RGAF09 to Martinique 1987 height (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (IGN1997)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: gg10_mart.txt
operation_version: IGN Mtq
description:
Replaces tfm from RRAF 1991, code 4561. May be used for transformations from WGS 84 to IGN 1987. Accuracy at each 0.025 deg x 0.025 degree grid node is given within the geoid model file.


auth_name: EPSG
name: RGAF09 to Guadeloupe 1988 height (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (IGN1997)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: gg10_gtbt.txt
operation_version: IGN Glp GT
description:
Replaces tfm from RRAF 1991, code 4562. May be used for transformations from WGS 84 to IGN 1988. Accuracy at each 0.025 deg x 0.025 degree grid node is given within the geoid model file.


auth_name: EPSG
name: RGAF09 to IGN 1988 MG height (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (IGN1997)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: gg10_mg.txt
operation_version: IGN Glp MG
description:
Replaces tfm from RRAF 1991, code 4563. May be used for transformations from WGS 84 to IGN 1988 MG. Accuracy at each 0.025 deg x 0.025 degree grid node is given within the geoid model file.


auth_name: EPSG
name: RGAF09 to IGN 1988 SM height (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (IGN1997)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: gg10_sm.txt
operation_version: IGN Glp StM
description:
Replaces tfm from RRAF 1991, code 4564. May be used for transformations from WGS 84 to IGN 1988 SM. Accuracy at each 0.025 deg x 0.025 degree grid node is given within the geoid model file.


auth_name: EPSG
name: RGAF09 to IGN 1988 LS height (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (IGN1997)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: gg10_ls.txt
operation_version: IGN Glp LSt
description:
Replaces tfm from RRAF 1991, code 4565. May be used for transformations from WGS 84 to IGN 1988 LS. Accuracy at each 0.025 deg x 0.025 degree grid node is given within the geoid model file.


auth_name: EPSG
name: RGAF09 to IGN 1992 LD height (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (IGN1997)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: gg10_ld.txt
operation_version: IGN Glp Des
description:
Replaces tfm from RRAF 1991, code 4566. Replaced by RGAF09 to IGN 2008 LD height (1), CT code 9131. May be used for transformations from WGS 84 to IGN 1992 LD. Accuracy at each 0.025° grid node is given within the geoid model file, approx. average 0.5m.


auth_name: EPSG
name: RGAF09 to IGN 1988 SB height (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (IGN1997)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: gg10_sb.txt
operation_version: IGN Glp StB
description:
Replaces tfm from RRAF 1991, code 4567. May be used for transformations from WGS 84 to IGN 1988 SB. Accuracy at each 0.025 deg x 0.025 degree grid node is given within the geoid model file.


auth_name: EPSG
name: SAD69 to SIRGAS 2000 (2)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: SAD69_003.gsb
operation_version: IBGE-Bra 1m 1996
description:
For IBGE, in onshore east and south Brazil only, replaces SAD69 to SIRGAS 2000 (1) (tfm code 15485) for pre-1996 data based on the classical geodetic network. May be used as transformation between SAD69 and WGS 84 - see tfm code 5542.


auth_name: EPSG
name: Corrego Alegre 1961 to WGS 84 (1)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: CA61_003.gsb
operation_version: OGP-Bra
description:
Parameters from Corrego Alegre 1961 to SIRGAS 2000 (1) (tfm code 5525) assuming that SIRGAS 2000 and WGS 84 are equal within the accuracy of the transformation.


auth_name: EPSG
name: Corrego Alegre 1970-72 to WGS 84 (2)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: CA7072_003.gsb
operation_version: OGP-Bra
description:
Parameters from Corrego Alegre 1970-72 to SIRGAS 2000 (1) (tfm code 5526) assuming that SIRGAS 2000 and WGS 84 are equal within the accuracy of the transformation.


auth_name: EPSG
name: SAD69 to WGS 84 (15)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: SAD69_003.gsb
operation_version: OGP-Bra 2m 1996
description:
Parameters values taken from SAD69 to SIRGAS 2000 (2) (tfm code 5528) assuming that SIRGAS 2000 and WGS 84 are equal within the accuracy of the transformation.


auth_name: EPSG
name: SAD69(96) to WGS 84 (1)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: SAD96_003.gsb
operation_version: OGP-Bra 1m 1996
description:
Parameters values taken from SAD69(96) to SIRGAS 2000 (1) (tfm code 5529) assuming that SIRGAS 2000 and WGS 84 are equal within the accuracy of the transformation.


auth_name: EPSG
name: FEH2010 to FCSVR10 height (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (Gravsoft)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: fehmarn_geoid10.gri
operation_version: FEM-Dnk-Deu Feh
description:
For reversible alternative to this transformation see FEH2010 to FEH2010 + FCSVR10 height (1) (code 9619).


auth_name: EPSG
name: GDA94 to AHD height (49)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (AUSGeoid v2)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: AUSGeoid09_V1.01.gsb
operation_version: GA-Aus09 mainland
description:
File name previously called AUSGeoid09_GDA94_V1.01_DOV_windows.gsb. Replaces AUSGeoid98 model. Uses AUSGeoid09 model which uses bi-cubic interpolation; bi-linear interpolation of the grid file will give results agreeing to within 1cm 99.97% of the time.


auth_name: EPSG
name: GDA94 to AHD (Tasmania) height (2)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (AUSGeoid v2)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: AUSGeoid09_GDA94_V1.01_DOV_windows.gsb
operation_version: GA-Aus09 Tas
description:
Replaces AusGeoid98 model. Uses AusGeoid09 model which uses bi-cubic interpolation; bi-linear interpolation of the grid file will give results agreeing to within 1cm 99.97% of the time. May be used for transformations from WGS 84 to AHD (Tasmania).


auth_name: EPSG
name: ED50 to ETRS89 (14)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: 100800401.gsb
operation_version: ICC-Esp Cat
description:
When included in concatenation from and to projected CRSs, gives same results as ED50 / UTM zone 31N to ETRS89 / UTM zone 31N (1) - see CRS code 5166.


auth_name: EPSG
name: MGI to ETRS89 (5)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: AT_GIS_GRID.gsb
operation_version: BEV-Aut NTv2
description:
Not to be used for cadastral purposes because it does not comply with the rules for control network tie-in as per Paragraph 3 of the Land Survey Regulations (Vermessungsverordnung) 2010. Replaced by GIS-Grid 2021 (MGI to ETRS89 (8), code 9910).


auth_name: EPSG
name: CIGD11 to GCVD54 height (ft) (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (CI)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: GCGM0811.TXT
operation_version: LSD-Cym
description:
Care: source CRS heights are in metres, transformation file parameter values and target CRS heights are in feet. For reversible alternative to this transformation see CIGD11 to CIGD11 + GCVD54 height (ft)) (code 9603).


auth_name: EPSG
name: CIGD11 to LCVD61 height (ft) (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (CI)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: LCGM0811.TXT
operation_version: LSD-Cym
description:
Care: source CRS heights are in metres, transformation file parameter values and target CRS heights are in feet. For reversible alternative to this transformation see CIGD11 to CIGD11 + LCVD61 height (ft) (1) (code 9604).


auth_name: EPSG
name: CIGD11 to CBVD61 height (ft) (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (CI)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: CBGM0811.TXT
operation_version: LSD-Cym
description:
Care: source CRS heights are in metres, transformation file parameter values and target CRS heights are in feet. For reversible alternative to this transformation see CIGD11 to CIGD11 + CBVD61 height (ft) (1) (code 9602).


auth_name: EPSG
name: Lisbon to ETRS89 (4)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: DLx_ETRS89_geo.gsb
operation_version: IGP-Prt 0.1m
description:
Derived from 1129 common stations in the national geodetic network. Residuals at 130 further test points average 0.09m, maximum 0.30m.


auth_name: EPSG
name: Datum 73 to ETRS89 (6)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: D73_ETRS89_geo.gsb
operation_version: IGP-Prt 0.1m
description:
Derived from 1129 common stations in the national geodetic network. Residuals at 130 further test points average 0.06m, maximum 0.16m.


auth_name: EPSG
name: NAD27 to NAD83(CSRS) (4)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: NB2783v2.gsb
operation_version: SNB-Can NB
description:
Introduced in 2011. Precision of 20 cm in area covered by the input data set and 40 cm anywhere else, with the exception of the northwest area of the province (near the border with Quebec) where the precision deteriorates to 80 cm.


auth_name: EPSG
name: NAD83(2011) to NAVD88 height (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (gtx)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: g2012bu0.bin
operation_version: NGS-US Conus
description:
Uses Geoid12B hybrid model. Renamed from Geoid12A but with no data changes. See information source for further information.


auth_name: EPSG
name: NAD83(2011) to NAVD88 height (2)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (gtx)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: g2012ba0.bin
operation_version: NGS-US AK
description:
Uses Geoid12B hybrid model. Renamed from Geoid12A but with no data changes. See information source for further information. For reversible alternative to this transformation see NAD83(2011) to NAD83(2011) + NAVD88 height (2) (code 9596).


auth_name: EPSG
name: NAD83(CSRS) to CGVD2013 height (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (NRCan byn)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: CGG2013n83.byn
operation_version: NRC Can CGG2013
description:
Uses CGG2013 model which uses bi-quadratic interpolation; bi-linear interpolation of the grid file will give results agreeing to within 1cm 99.97% of the time.


auth_name: EPSG
name: Tokyo to JGD2000 (2)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: tky2jgd.gsb
operation_version: OGP-Jpn
description:
NTv2 grid derived by ESRI from that supplied by GSI in application tky2jgd. After Tohoku earthquake of 2011 accuracy in northern Honshu reduced to 1-5m and in this area replaced by Tokyo to JGD2011 (tfm code 6714).


auth_name: EPSG
name: Tokyo to JGD2011 (2)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: tky2jgd.gsb
operation_version: OGP-Jpn ex N Honshu
description:
Parameter values from Tokyo to JGD2000 (2) (tfm code 6712) as in area of applicability JGD2011 = JGD2000. NTv2 grid derived by ESRI from that supplied by GSI in application tky2jgd. See Tokyo to JGD2011 (1) (tfm code 6714) for northern Honshu area.


auth_name: EPSG
name: TM75 to ETRS89 (3)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: tm75_etrs89.gsb
operation_version: OSI-Ire NT approximation
description:
Approximate alternative to official OS polynomial method (tfm code 1041). May be taken as approximate transformation TM75 to WGS 84 - see code 6947.


auth_name: EPSG
name: TM75 to WGS 84 (4)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: tm75_etrs89.gsb
operation_version: OGP-Ire NT approx
description:
Parameter values taken from TM75 to ETRS89 (3) (tfm code 6946) assuming that ETRS89 is coincident with WGS 84 within the accuracy of the tfm. Within accuracy of the tfm equivalent to TM75 to WGS 84 (1) (tfm code 1042).


auth_name: EPSG
name: RD/83 to ETRS89 (2)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: NTv2_SN.gsb
operation_version: GeoSN-Deu SN
description:
Recommended by Saxony State Spatial Data and Land Survey Corporation for transformations based on official geospatial data of Saxony. Accuracy 3mm within Saxony; within the rest of RD/83 definition area results at least coincide with EPSG CT code15868.


auth_name: EPSG
name: Amersfoort to ETRS89 (7)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: rdtrans2008.gsb
operation_version: RDNAP-Nld 2008
description:
Consistent to within 1mm with official RNAPTRANS(TM)2008 at ground level onshore and at MSL offshore. The horizontal deviation using this NTv2 grid is approximately 1mm per 50m height difference from ground level or MSL.


auth_name: EPSG
name: ETRS89 to NAP height (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (gtx)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: naptrans2008.gtx
interpolation_crs_auth_name: EPSG
operation_version: RDNAP-Nld 2008
description:
Alternative to vertical component of official 3D RDNAPTRANS(TM)2008. The naptrans2008 correction grid incorporates the NLGEO2004 geoid model plus a fixed offset.


auth_name: EPSG
name: NAD83(MA11) to GUVD04 height (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (gtx)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: g2012bg0.bin
operation_version: NGS-Gum 12B
description:
Uses Geoid12B hybrid model. See information source for further information. For reversible alternative to this transformation see NAD83(MA11) to NAD83(MA11) + GUVD04 height (1) (code 9624).


auth_name: EPSG
name: NAD83(MA11) to NMVD03 height (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (gtx)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: g2012bg0.bin
operation_version: NGS-Mnp 12B
description:
Uses Geoid12B hybrid model. See information source for further information. For reversible alternative to this transformation see NAD83(MA11) to NAD83(MA11) + NMVD03 height (1) (code 9625).


auth_name: EPSG
name: NAD83(PA11) to ASVD02 height (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (gtx)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: g2012bs0.bin
operation_version: NGS-Asm 12B
description:
Uses Geoid12B hybrid model. See information source for further information. For reversible alternative to this transformation see NAD83(PA11) to NAD83(PA11) + ASVD02 height (1) (code 9626).


auth_name: EPSG
name: CH1903 to CHTRS95 (1)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: CHENyx06_ETRS.gsb
operation_version: BfL-Che NTv2
description:
Equivalent to concatenation of transformations 15486 (CH1903 to CH1903+) and 1509 (CH1903+ to CHTRS95) to within 2cm. Also used as transformation between CH1903 and ETRS89 (see code 7674).


auth_name: EPSG
name: CH1903 to ETRS89 (2)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: CHENyx06_ETRS.gsb
operation_version: BfL-Che NTv2
description:
Equivalent to concatenation of CTs 15486 (CH1903 to CH1903+) and 1647 (CH1903+ to CHTRS95) to within 2cm. Also used as CT between CH1903 and CHTRS95 (see code 7673). Replaces CT code 1646. May be used as approximate CT CH1903 to WGS 84 - see code 7788.


auth_name: EPSG
name: OSGB36 to ETRS89 (2)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: OSTN15_NTv2_OSGBtoETRS.gsb
operation_version: OSGB-UK Gbr15 NT
description:
Approximate alternative to official OSTN15 method (tfm code 7953). May be taken as approximate transformation OSGB36 to WGS 84 - see code 7710. Replaces OSGB36 to ETRS89 (1) (tfm code 5338).


auth_name: EPSG
name: OSGB36 to WGS 84 (9)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: OSTN15_NTv2_OSGBtoETRS.gsb
operation_version: OGP-UK Gbr15 NT
description:
Parameter values taken from OSGB36 to ETRS89 (2) (tfm code 7709) assuming that ETRS89 is coincident with WGS 84 within the accuracy of the tfm. Replaces OSGB36 to WGS 84 (7) (tfm code 5339).


auth_name: EPSG
name: ETRS89 to ODN height (2)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (OSGM-GB)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: OSTN15_OSGM15_GB.txt
operation_version: OS-UK Gbr 2015
description:
OSGM15 supersedes OSGM02 geoid model. Replaces ETRS89 to Newlyn height (1) (tfm code 10021). For reversible alternative to this transformation see ETRS89 to ETRS89 + ODN height (2) (code 9587).


auth_name: EPSG
name: ETRS89 to ODN Orkney height (2)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (OSGM-GB)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: OSTN15_OSGM15_GB.txt
operation_version: OS-UK Ork 2015
description:
OSGM15 supersedes OSGM02 geoid model. Replaces ETRS89 to Newlyn (Orkney Isles) height (1) (tfm code 10029). For reversible alternative to this transformation see ETRS89 to ETRS89 + ODN Orkney height (2) (code 9586).


auth_name: EPSG
name: ETRS89 to ODN (Offshore) height (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (OSGM-GB)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: OSTN15_OSGM15_GB.txt
operation_version: OS-UK Off 2015
description:
Replaces ETRS89 to Fair Isle/Flannan Isles/Foula/North Rona/St Kilda/Sule Skerry height (1) (tfm codes 10024-26, 10030-31 and 10034). For reversible alternative to this transformation see ETRS89 to ETRS89 + ODN (Offshore) height (1) (code 9588).


auth_name: EPSG
name: ETRS89 to Lerwick height (2)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (OSGM-GB)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: OSTN15_OSGM15_GB.txt
operation_version: OS -UK Shet 2015
description:
OSGM15 supersedes OSGM02 geoid model. Replaces ETRS89 to Lerwick height (1) (tfm code 10027). For reversible alternative to this transformation see ETRS89 to ETRS89 + Lerwick height (2) (code 9589).


auth_name: EPSG
name: ETRS89 to Stornoway height (2)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (OSGM-GB)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: OSTN15_OSGM15_GB.txt
operation_version: OS-UK Heb 2015
description:
OSGM15 supersedes OSGM02 geoid model. Replaces ETRS89 to Stornaway height (1) (tfm code 10033). For reversible alternative to this transformation see ETRS89 to ETRS89 + Stornoway height (2) (code 9584).


auth_name: EPSG
name: ETRS89 to St. Marys height (2)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (OSGM-GB)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: OSTN15_OSGM15_GB.txt
operation_version: OS-UK Scilly 2015
description:
OSGM15 supersedes OSGM02 geoid model. Replaces ETRS89 to St Marys height (1) (tfm code 10032). For reversible alternative to this transformation see ETRS89 to ETRS89 + St. Marys height (2) (code 9585).


auth_name: EPSG
name: ETRS89 to Douglas height (2)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (OSGM-GB)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: OSTN15_OSGM15_GB.txt
operation_version: OS-UK Man 2015
description:
OSGM15 supersedes OSGM02 geoid model. Replaces ETRS89 to Douglas height (1) (tfm code 10023). For reversible alternative to this transformation see ETRS89 to ETRS89 + Douglas height (2) (code 9590).


auth_name: EPSG
name: CH1903 to WGS 84 (3)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: CHENyx06_ETRS.gsb
operation_version: OGP-Che NTv2
description:
Parameter values from CH1903 to ETRS89 (2) (code 7674) assuming that ETRS89 is equivalent to WGS 84 within the accuracy of the transformation. Equivalent to concatenation of transformations 15486 and 1676.


auth_name: EPSG
name: NZVD2016 height to Auckland 1946 height (1)
method_auth_name: EPSG
method_name: Vertical Offset by Grid Interpolation (NZLVD)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Vertical offset file
grid_name: auckland-1946-to-nzvd2016-conversion.csv
interpolation_crs_auth_name: EPSG
operation_version: LINZ-NZ AUCK
description:
Derived at 260 control points. Mean offset 0.292m, standard deviation 0.029m, maximum difference from mean 0.075m.


auth_name: EPSG
name: NZVD2016 height to Bluff 1955 height (1)
method_auth_name: EPSG
method_name: Vertical Offset by Grid Interpolation (NZLVD)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Vertical offset file
grid_name: bluff-1955-to-nzvd2016-conversion.csv
interpolation_crs_auth_name: EPSG
operation_version: LINZ-NZ BLUF
description:
Derived at 71 control points. Mean offset 0.273m, standard deviation 0.034m, maximum difference from mean 0.079m.


auth_name: EPSG
name: NZVD2016 height to Dunedin 1958 height (1)
method_auth_name: EPSG
method_name: Vertical Offset by Grid Interpolation (NZLVD)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Vertical offset file
grid_name: dunedin-1958-to-nzvd2016-conversion.csv
interpolation_crs_auth_name: EPSG
operation_version: LINZ-NZ DUNE
description:
Derived at 197 control points. Mean offset 0.326m, standard deviation 0.043m, maximum difference from mean 0.152m.


auth_name: EPSG
name: NZVD2016 height to Dunedin-Bluff 1960 height (1)
method_auth_name: EPSG
method_name: Vertical Offset by Grid Interpolation (NZLVD)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Vertical offset file
grid_name: dunedin-bluff-1960-to-nzvd2016-conversion.csv
interpolation_crs_auth_name: EPSG
operation_version: LINZ-NZ DUBL
description:
Derived at 205 control points. Mean offset 0.254m, standard deviation 0.039m, maximum difference from mean 0.11m.


auth_name: EPSG
name: NZVD2016 height to Gisborne 1926 height (1)
method_auth_name: EPSG
method_name: Vertical Offset by Grid Interpolation (NZLVD)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Vertical offset file
grid_name: gisborne-1926-to-nzvd2016-conversion.csv
interpolation_crs_auth_name: EPSG
operation_version: LINZ-NZ GISB
description:
Derived at 274 control points. Mean offset 0.343m, standard deviation 0.025m, maximum difference from mean 0.09m.


auth_name: EPSG
name: NZVD2016 height to Lyttelton 1937 height (1)
method_auth_name: EPSG
method_name: Vertical Offset by Grid Interpolation (NZLVD)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Vertical offset file
grid_name: lyttelton-1937-to-nzvd2016-conversion.csv
interpolation_crs_auth_name: EPSG
operation_version: LINZ-NZ LYTT
description:
Derived at 923 control points. Mean offset 0.34m, standard deviation 0.041m, maximum difference from mean 0.149m.


auth_name: EPSG
name: NZVD2016 height to Moturiki 1953 height (1)
method_auth_name: EPSG
method_name: Vertical Offset by Grid Interpolation (NZLVD)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Vertical offset file
grid_name: moturiki-1953-to-nzvd2016-conversion.csv
interpolation_crs_auth_name: EPSG
operation_version: LINZ-NZ MOTU
description:
Derived at 519 control points. Mean offset 0.309m, standard deviation 0.071m, maximum difference from mean 0.231m.


auth_name: EPSG
name: NZVD2016 height to Napier 1962 height (1)
method_auth_name: EPSG
method_name: Vertical Offset by Grid Interpolation (NZLVD)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Vertical offset file
grid_name: napier-1962-to-nzvd2016-conversion.csv
interpolation_crs_auth_name: EPSG
operation_version: LINZ-NZ NAPI
description:
Derived at 207 control points. Mean offset 0.203m, standard deviation 0.034m, maximum difference from mean 0.096m.


auth_name: EPSG
name: NZVD2016 height to Nelson 1955 height (1)
method_auth_name: EPSG
method_name: Vertical Offset by Grid Interpolation (NZLVD)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Vertical offset file
grid_name: nelson-1955-to-nzvd2016-conversion.csv
interpolation_crs_auth_name: EPSG
operation_version: LINZ-NZ NELS
description:
Derived at 256 control points. Mean offset 0.329m, standard deviation 0.039m, maximum difference from mean 0.114m.


auth_name: EPSG
name: NZVD2016 height to One Tree Point 1964 height (1)
method_auth_name: EPSG
method_name: Vertical Offset by Grid Interpolation (NZLVD)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Vertical offset file
grid_name: onetreepoint-1964-to-nzvd2016-conversion.csv
interpolation_crs_auth_name: EPSG
operation_version: LINZ-NZ ONTP
description:
Derived at 137 control points. Mean offset 0.077m, standard deviation 0.042m, maximum difference from mean 0.107m.


auth_name: EPSG
name: NZVD2016 height to Stewart Island 1977 height (1)
method_auth_name: EPSG
method_name: Vertical Offset by Grid Interpolation (NZLVD)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Vertical offset file
grid_name: stewartisland-1977-to-nzvd2016-conversion.csv
interpolation_crs_auth_name: EPSG
operation_version: LINZ-NZ STWT
description:
Derived at 4 control points. Mean offset 0.299m, standard deviation 0.025m, maximum difference from mean 0.039m.


auth_name: EPSG
name: NZVD2016 height to Taranaki 1970 height (1)
method_auth_name: EPSG
method_name: Vertical Offset by Grid Interpolation (NZLVD)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Vertical offset file
grid_name: taranaki-1970-to-nzvd2016-conversion.csv
interpolation_crs_auth_name: EPSG
operation_version: LINZ-NZ TARA
description:
Derived at 125 control points. Mean offset 0.286m, standard deviation 0.026m, maximum difference from mean 0.07m.


auth_name: EPSG
name: NZVD2016 height to Wellington 1953 height (1)
method_auth_name: EPSG
method_name: Vertical Offset by Grid Interpolation (NZLVD)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Vertical offset file
grid_name: wellington-1953-to-nzvd2016-conversion.csv
interpolation_crs_auth_name: EPSG
operation_version: LINZ-NZ WGTN
description:
Derived at 137 control points. Mean offset 0.408m, standard deviation 0.054m, maximum difference from mean 0.112m.


auth_name: EPSG
name: SHGD2015 to SHVD2015 height (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (EGM2008)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: Und_min2.5x2.5_egm2008_isw=82_WGS84_TideFree.gz
operation_version: ENRD-Shn Hel
description:
This transformation defines SHVD2015 heights. For reversible alternative to this transformation see SHGD2015 to SHGD2015 + SHVD2015 height (1) (code 9617).


auth_name: EPSG
name: Canada velocity grid v6
method_auth_name: EPSG
method_name: Point motion by grid (Canada NTv2_Vel)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Point motion velocity grid file
grid_name: cvg60.cvb
operation_version: NRC-Can cvg6.0
description:
NOTE: Before being deprecated this record had a second parameter (code 1048, value 8251) which has been removed due to being non-compliant with the data model.


auth_name: EPSG
name: ETRS89 to Belfast height (2)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (OSGM15-Ire)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: OSGM15_Belfast.gri
operation_version: OS-UK NI 2015
description:
OSGM15 supersedes OSGM02 geoid model. Replaces ETRS89 to Belfast height (1) (tfm code 5334). For reversible alternative to this transformation see ETRS89 to ETRS89 + Belfast height (2) (code 9592).


auth_name: EPSG
name: ETRS89 to Malin Head height (2)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (OSGM15-Ire)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: OSGM15_Malin.gri
operation_version: OS-Ire 2015
description:
OSGM15 supersedes OSGM02 geoid model. Replaces ETRS89 to Malin Head height (1) (tfm code 5335). For reversible alternative to this transformation see ETRS89 to ETRS89 + Malin Head height (2) (code 9591).


auth_name: EPSG
name: NGVD29 height (m) to NAVD88 height (1)
method_auth_name: EPSG
method_name: Vertical Offset by Grid Interpolation (VERTCON)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Vertical offset file
grid_name: vertconw.94
operation_version: NGS-US Conus W
description:
In this area the NGVD29 vertical reference surface is approximately 0.6 to 1.6m below the NAVD88 datum surface. Interpolation within the gridded data file may be made using either NAD27 or any of the realizations of NAD83 applicable to US conus.


auth_name: EPSG
name: NGVD29 height (m) to NAVD88 height (2)
method_auth_name: EPSG
method_name: Vertical Offset by Grid Interpolation (VERTCON)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Vertical offset file
grid_name: vertconc.94
operation_version: NGS-US Conus C
description:
In the SE of this area the NGVD29 surface is 0 to 0.1m above the NAVD88 surface; in the W it is 0.6 to 0.9m below the NAVD88 surface. Interpolation in the data file may be made using either NAD27 or any of the NAD83 realizations applicable to US conus.


auth_name: EPSG
name: NGVD29 height (m) to NAVD88 height (3)
method_auth_name: EPSG
method_name: Vertical Offset by Grid Interpolation (VERTCON)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Vertical offset file
grid_name: vertcone.94
operation_version: NGS-US Conus E
description:
In this area the NGVD29 vertical reference surface is approximately 0 to 0.5m above the NAVD88 surface. Interpolation within the gridded data file may be made using either NAD27 or any of the realisations of NAD83 applicable to US conus.


auth_name: EPSG
name: WGS 84 to MSL height (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (EGM2008)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: Und_min1x1_egm2008_isw=82_WGS84_TideFree.gz
operation_version: IOGP-World
description:
Parameter values are from WGS 84 to EGM2008 height (2) (CT code 3859) assuming that the EGM2008 surface equals MSL surface within the accuracy of the transformation. For reversible alternative see WGS 84 to WGS 84 + MSL height (1) (code 9706).


auth_name: EPSG
name: GR96 to GVR2000 height (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (Gravsoft)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: gr2000g.gri
operation_version: SDFE-Grl
description:
Defines GVR2000. File is also available in NOAA VDatum format (ggeoid2000.gtx) and GeoTIFF format (ggeoid2000.tif). For reversible alternative to this transformation see GR96 to GR96 + GVR2000 height (1) (code 9598).


auth_name: EPSG
name: GR96 to GVR2016 height (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (Gravsoft)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: ggeoid16.gri
operation_version: SDFE-Grl
description:
Defines GVR2016. File is also available in NOAA VDatum format (ggeoid2016.gtx) and GeoTIFF format (ggeoid2016.tif). For reversible alternative to this transformation see GR96 to GR96 + GVR2016 height (1) (code 9599).


auth_name: EPSG
name: RGF93 to NGF IGN69 height (2)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (IGN1997)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: RAF09.mnt
operation_version: IGN Fra 09
description:
Replaces RGF93 to NGF IGN69 height (1) (code 10000). Accuracy at each 0.1 deg x 0.1 degree grid node is given within the geoid model file.


auth_name: EPSG
name: RGF93 to IGN78 Corsica height (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (IGN1997)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: RAC09.mnt
operation_version: IGN Fra Cor 09
description:
Replaces RGF93 to NGF IGN69 height (1) (code 10002). Accuracy at each 0.1 deg x 0.1 degree grid node is given within the geoid model file.


auth_name: EPSG
name: ETRS89 to ETRS89 + Baltic 1957 height (1)
method_auth_name: EPSG
method_name: Geog3D to Geog2D+GravityRelatedHeight (gtx)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: Slovakia_ETRS89h_to_Baltic1957.gtx
interpolation_crs_auth_name: EPSG
operation_version: UGKK-Svk
description:
Uses ETRS89 (realization ETRF2000) and quasigeoid model DVRM05. 1 sigma = 34 mm (test performed on 563 independent points). Recommended as part of transformation between Baltic 1957 height and EVRF2007 height (see concatenated operation code 8363).


auth_name: EPSG
name: ETRS89 to ETRS89 + EVRF2007 height (1)
method_auth_name: EPSG
method_name: Geog3D to Geog2D+GravityRelatedHeight (gtx)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: Slovakia_ETRS89h_to_EVRF2007.gtx
interpolation_crs_auth_name: EPSG
operation_version: UGKK-Svk
description:
Uses ETRS89 (realization ETRF2000) and quasigeoid model DMQSK2014E. 1 sigma = 29 mm (test performed on 93 independent points). Recommended as part of transformation between Baltic 1957 height and EVRF2007 height (see concatenated operation code 8363).


auth_name: EPSG
name: BD72 to ETRS89 (3)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: bd72lb72_etrs89lb08.gsb
operation_version: IGN-Bel 0.01m
description:
File name is lower case and despite its name is between geographic CRSs. (Similarly-named file in upper case BD72LB72_ETRS89LB08 operates in projected CRS domain).


auth_name: EPSG
name: RGF93 v2 to NGF-IGN69 height (2)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (IGN2009)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: RAF09.mnt
operation_version: IGN Fra 09
description:
Replaces ggf97a geoid model [RGF93 v1 to NGF IGN69 height (1) (code 10000)]. Replaced by RAF18 model. Accuracy at each 0.0333333333333° in longitude and 0.025° in latitude grid node is given within the model file.


auth_name: EPSG
name: RGF93 v2 to NGF-IGN78 height (2)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (IGN2009)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: RAC09.mnt
operation_version: IGN Fra Cor 09
description:
Replaces ggf97a model [RGF93 v1 to NGF-IGN78 height (1) (code 10002)]. Accuracy at each grid node is given in the geoid model file. For reversible alternative see RGF93 v2 to RGF93 v2 + NGF-IGN78 height (2) (code 9639).


auth_name: EPSG
name: GDA94 to GDA2020 (4)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: GDA94_GDA2020_conformal_christmas_island.gsb
operation_version: ICSM-Cxr Conf
description:
See GDA94 to GDA2020 (1) (code 8048) for transformation using Helmert method which gives identical results.


auth_name: EPSG
name: GDA94 to GDA2020 (3)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: GDA94_GDA2020_conformal.gsb
operation_version: ICSM-Aus NTv2 Conf
description:
Gives identical results to Helmert transformation GDA94 to GDA2020 (1) (code 8048). See GDA94 to GDA2020 (2) (code 8447) for alternative with local distortion modelling included. GDA2020 Technical Manual and fact sheet T1 give guidance on which to use.


auth_name: EPSG
name: GDA94 to GDA2020 (2)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: GDA94_GDA2020_conformal_and_distortion.gsb
operation_version: ICSM-Aus Conf and Dist
description:
See GDA94 to GDA2020 (1) or (3) (codes 8048 and 8446) for alternative conformal-only transformation without local distortion modelling. GDA2020 Technical Manual and fact sheet T1 give guidance on which to use.


auth_name: EPSG
name: GDA2020 to AHD height (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (AUSGeoid v2)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: AUSGeoid2020_20180201.gsb
operation_version: GA-Aus 2020
description:
File name previously called AUSGeoid2020_windows_binary.gsb. Uncertainties given in accompanying file AUSGeoid2020_20180201_error.gsb. For reversible alternative to this transformation see GDA2020 to GDA2020 + AHD height (1) (code 9466).


auth_name: EPSG
name: St. George Island to NAD83 (2)
method_auth_name: EPSG
method_name: NADCON5 (2D)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: nadcon5.sg1952.nad83_1986.stgeorge.lat.trn.20160901.b
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: nadcon5.sg1952.nad83_1986.stgeorge.lon.trn.20160901.b
operation_version: NGS-Usa AK StG Nadcon5
description:
Uses NADCON5 method which expects longitudes positive east in range 0-360°; EPSG source and target CRSs have longitudes positive east in range -180° to +180°.


auth_name: EPSG
name: NAD27 to NAD83 (8)
method_auth_name: EPSG
method_name: NADCON5 (2D)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: nadcon5.nad27.nad83_1986.alaska.lat.trn.20160901.b
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: nadcon5.nad27.nad83_1986.alaska.lon.trn.20160901.b
operation_version: NGS-Usa AK Nadcon5
description:
Uses NADCON5 method which expects longitudes positive east in range 0-360°; source and target CRSs have longitudes positive east in range -180° to +180°. Accuracy at 67% confidence level is 0.5m onshore, 5m nearshore and undetermined farther offshore.


auth_name: EPSG
name: NAD27 to NAD83 (7)
method_auth_name: EPSG
method_name: NADCON5 (2D)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: nadcon5.nad27.nad83_1986.conus.lat.trn.20160901.b
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: nadcon5.nad27.nad83_1986.conus.lon.trn.20160901.b
operation_version: NGS-Usa Conus Nadcon5
description:
NADCON5 method expects longitudes 0-360°; source and target CRS longitudes in range ±180°. Accuracy at 67% confidence level is 0.15m onshore, 1m nearshore and undetermined farther offshore. For application in Gulf of Mexico refer to IOGP report 373-26.


auth_name: EPSG
name: Canada velocity grid v6
method_auth_name: EPSG
method_name: Point motion by grid (Canada NTv2_Vel)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Point motion velocity grid file
grid_name: NAD83v6VG.gvb
operation_version: NRC-Can cvg6.0
description:
File initially published with name cvg60.cvb, later renamed to NAD83v60VG.gvb with no change of content.


auth_name: EPSG
name: RGF93 v2 to NGF-IGN69 height (3)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (IGN2009)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: RAF18.mnt
operation_version: IGN Fra 18
description:
Replaces RAF09 geoid model [RGF93 v2 to NGF-IGN69 height (2) (code 8371)]. Replaced by RAF18b model. May also be found with filename RAF18.tac. For reversible alternative see RGF93 v2 to RGF93 v2 + NGF-IGN69 height (3) (code 9638).


auth_name: EPSG
name: NAD27 to NAD83(CSRS)v3 (5)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: ON27CSv1.GSB
operation_version: LIO-Can Ont ex Tor
description:
Derived through NAD83(CSRS)v3 but within accuracy of transformation may be assumed to apply to any version. For Toronto use NAD27 to NAD83(CSRS) (6) (CT code 9108).


auth_name: EPSG
name: NAD27 to NAD83(CSRS)v3 (6)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: TOR27CSv1.GSB
operation_version: LIO-Can Ont Tor
description:
Derived through NAD83(CSRS)v3 but within accuracy of transformation may be assumed to apply to any version. For Ontario excluding Toronto use NAD27 to NAD83(CSRS) (5) (CT code 9107).


auth_name: EPSG
name: NAD27(76) to NAD83(CSRS)v3 (1)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: ON76CSv1.GSB
operation_version: LIO-Can Ont
description:
Derived through NAD83(CSRS)v3 but within accuracy of transformation may be assumed to apply to any version.


auth_name: EPSG
name: NAD27 to NAD83(CSRS)v2 (7)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: BC_27_98.GSB
operation_version: GeoBC-Can BC CSRSv2
description:
Derived through NAD83(CSRS)v2. Replaced by NAD27 to NAD83(CSRS) (8) (CT code 9113) for CRD, NAD27 to NAD83(CSRS) (9) (CT code 9114) forn north Vancouver Island and NAD27 to NAD83(CSRS) (10) (CT code 9115) for mainland.


auth_name: EPSG
name: NAD83 to NAD83(CSRS)v2 (6)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: BC_93_98.GSB
operation_version: GeoBC-Can BC CSRSv2
description:
Derived through NAD83(CSRS)v2. Replaced by NAD83 to NAD83(CSRS) (7) (CT code 9117) for CRD, NAD83 to NAD83(CSRS) (8) (CT code 9118) for north Vancouver Island and NAD83 to NAD83(CSRS) (9) (CT code 9119) for mainland.


auth_name: EPSG
name: ITRF2008 to CGVD2013(CGG2013) height (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (NRCan byn)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: CGG2013i83.byn
operation_version: NRC Can CGG2013
description:
Uses CGG2013 model derived through NAD83(CSRS)v6 which uses bi-quadratic interpolation; bi-linear interpolation of the grid file will give results agreeing to within 1cm 99.97% of the time. Replaced by CT code 9125.


auth_name: EPSG
name: ITRF2008 to CGVD2013a(2010) height (2)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (NRCan byn)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: CGG2013ai08.byn
operation_version: NRC Can CGG2013a
description:
Replaces CT code 9124. Uses CGG2013a model at epoch 2010.0. In ITRF the CGVD2013 geoid velocity is not zero so CGVD2013 heights derived through ITRF change with respect to those derived through NAD83(CSRS). CGRSC recommends using NAD83(CSRS) (code 9247).


auth_name: EPSG
name: RGAF09 to IGN 2008 LD height (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (IGN2009)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: RALD2016.mnt
operation_version: IGN-Glp Des
description:
Replaces RGAF09 to IGN 1992 LD height (1) (CT code 5507). Accuracy 0.1-0.2m within onshore area. For reversible alternative to this transformation see RGAF09 to RGAF09 + IGN 2008 LD height (1) (code 9636).


auth_name: EPSG
name: RRAF 1991 to IGN 2008 LD height (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (IGN2009)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: RALDW842016.mnt
operation_version: IGN Glp Des
description:
Replaces RRAF 1991 to IGN 1992 LD height (1) (CT code 4566). Accuracy 0.1-0.2m within onshore area. For reversible alternative to this transformation see RRAF 1991 to RRAF 1991 + IGN 2008 LD height (1) (code 9642).


auth_name: EPSG
name: RGAF09 to Guadeloupe 1988 height (2)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (IGN2009)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: RAGTBT2016.mnt
operation_version: IGN Glp GT 2016
description:
Replaces RGAF09 to Guadeloupe 1988 height (1) (CT code 5503). Accuracy 0.01-0.05m within onshore areas. For reversible alternative to this transformation see RGAF09 to RGAF09 + Guadeloupe 1988 height (2) (code 9631).


auth_name: EPSG
name: RGAF09 to IGN 1988 LS height (2)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (IGN2009)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: RALS2016.mnt
operation_version: IGN Glp LSt 2016
description:
Replaces RGAF09 to IGN 1988 LS height (2) (CT code 5506). Accuracy 0.05-0.1m within onshore area. For reversible alternative to this transformation see RGAF09 to RGAF09 to IGN 1988 LS height (2) (code 9632).


auth_name: EPSG
name: RGAF09 to IGN 1988 MG height (2)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (IGN2009)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: RAMG2016.mnt
operation_version: IGN Glp MG 2016
description:
Replaces RGAF09 to IGN 1988 MG height (1), CT code 5504. Accuracy 0.0.5-0.1m within onshore area. For reversible alternative to this transformation see RGAF09 to RGAF09 + IGN 1988 MG height (2) (code 9633).


auth_name: EPSG
name: RGAF09 to Martinique 1987 height (2)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (IGN2009)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: RAMART2016.mnt
operation_version: IGN Mtq 2016
description:
Replaces RGAF09 to Martinique 1987 height (1) (CT code 5502). Accuracy 0.01m to 0.05m within onshore area. For reversible alternative to this transformation see RGAF09 to RGAF09 + Martinique 1987 height (2) (code 9637).


auth_name: EPSG
name: RGAF09 to IGN 1988 SB height (2)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (IGN2009)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: gg10_sbv2.mnt
operation_version: IGN Glp StB v2
description:
Accuracy 0.05m to 0.1m. Replaces RGAF09 to IGN 1988 SB height (1), transformation code 5508. For reversible alternative to this transformation see RGAF09 to RGAF09 + IGN 1988 SB height (2) (code 9634).


auth_name: EPSG
name: RGAF09 to IGN 1988 SM height (2)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (IGN2009)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: gg10_smv2.mnt
operation_version: IGN Glp StM v2
description:
Accuracy 0.05m to 0.1m. Replaces RGAF09 to IGN 1988 SM height (1), transformation code 5505. For reversible alternative to this transformation see RGAF09 to RGAF09 + IGN 1988 SM height (2) (code 9635).


auth_name: EPSG
name: RGSPM06 to Danger 1950 height (2)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (IGN2009)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: RASPM2018.mnt
operation_version: IGN-SPM v2
description:
Accuracy 0.01m to 0.05m within onshore area. Replaces RGSPM06 to Danger 1950 height (1), CT code 9137. For reversible alternative to this transformation see RGSPM06 to RGSPM06 + Danger 1950 height (2) (code 9641).


auth_name: EPSG
name: NAD83(2011) to NAVD88 height (3)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (gtx)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: g2018u0.bin
operation_version: NGS-US Conus 18
description:
Uses Geoid18 hybrid model. Replaces 12B model. See information source for further information. For reversible alternative to this transformation see NAD83(2011) to NAD83(2011) + NAVD88 height (3) (code 9595).


auth_name: EPSG
name: NAD83(2011) to PRVD02 height (2)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (gtx)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: g2018p0.bin
operation_version: NGS-Pri 18
description:
Uses Geoid18 hybrid model. Replaces 12B model. See information source for further information. For reversible alternative to this transformation see NAD83(2011) to PRVD02 height (2) (code 9622).


auth_name: EPSG
name: NAD83(2011) to VIVD09 height (2)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (gtx)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: g2018p0.bin
operation_version: NGS-Vir 18
description:
Uses Geoid18 hybrid model. Replaces 12B model. See information source for further information. For reversible alternative to this transformation see NAD83(2011) to NAD83(2011) + VIVD09 height (2) (code 9623).


auth_name: EPSG
name: ISN93 to ISN2016 (1)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: ISN93_ISN2016.gsb
operation_version: LMI-Isl
description:
Grid transformation based on Kriging between ISN93 and ISN2016. Accuracy is better than 5 cm in stable areas but can be around 25 cm in areas that have suffered deformation due to earthquake or volcanic eruption.


auth_name: EPSG
name: ISN2004 to ISN2016 (1)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: ISN2004_ISN2016.gsb
operation_version: LMI-Isl
description:
Grid transformation based on Kriging between ISN2004 and ISN2016. Accuracy is better than 5 cm in stable areas but can be around 25 cm in areas that have suffered deformation due to earthquake or volcanic eruption.


auth_name: EPSG
name: ATS77 to NAD83(CSRS)v3 (3)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: NS778301.gsb
operation_version: NSGC-Can NS
description:
Can be taken as an approximate transformation ATS77 to WGS 84 - see code 1851. Replaced by ATS77 to NAD83(CSRS)v6 (4) (transformation code 9106).


auth_name: EPSG
name: NAD27(CGQ77) to NAD83(CSRS)v2 (1)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: CGQ77-98.gsb
operation_version: SGQ-Can QC
description:
Uses NT method which expects longitudes positive west; EPSG GeogCRSs NAD27(CGQ77) (code 4609) and NAD83(CSRS) (code 4617) have longitudes positive east.


auth_name: EPSG
name: NAD83 to NAD83(CSRS)v2 (1)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: NAD83-98.gsb
operation_version: SGQ-Can QC
description:
Uses NT method which expects longitudes positive west; EPSG GeogCRSs NAD83 (code 4269) and NAD83(CSRS)v2 (code 8237) have longitudes positive east. Can be taken as an approximate transformation NAD83 to WGS 84 - see code 1696.


auth_name: EPSG
name: NAD83(CSRS)v6 to CGVD2013(CGG2013) height (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (NRCan byn)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: CGG2013n83.byn
operation_version: NRC Can CGG2013
description:
Uses CGG2013 model which uses bi-quadratic interpolation; bi-linear interpolation of the grid file will give results agreeing to within 1cm 99.97% of the time. Replaced by CGG2013a model (CT code 9247).


auth_name: EPSG
name: NAD83(CSRS)v6 to CGVD2013a(2010) height (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (NRCan byn)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: CGG2013an83.byn
operation_version: NRC Can CGG2013a
description:
Defines CGVD2013 heights. Because CSRS ellipsoidal heights are affected by glacial isostatic adjustment, CGVD2013 heights also change with time. For reversible alternative see NAD83(CSRS)v6 to NAD83(CSRS)v6 + CGVD2013a(2010) height (1) (code 9644).


auth_name: EPSG
name: POSGAR 2007 to SRVN16 height (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (Gravsoft)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: GEOIDE-Ar16.gri
operation_version: IGN-Arg
description:
Uses geoid model Ar16. See information source for more information. For reversible alternative to this transformation see POSGAR 2007 to POSGAR 2007 + SRVN16 height (1) (code 9621).


auth_name: EPSG
name: GHA height to EVRF2000 Austria height (1)
method_auth_name: EPSG
method_name: Vertical Offset by Grid Interpolation (BEV AT)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Vertical offset file
grid_name: GV_HoehenGrid_V1.csv
interpolation_crs_auth_name: EPSG
operation_version: BEV-Aut
description:
Care! Austrian literature describes this transformation in direction EVRF2000 Austria height to GHA height with offset subtracted. EPSG method has offset as an addition. See method formula and example. The grid is implemented in BEV-Transformator.


auth_name: EPSG
name: ETRS89 to EVRF2000 Austria height (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (BEV AT)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: GEOID_GRS80_Oesterreich.csv
interpolation_crs_auth_name: EPSG
operation_version: BEV-Aut
description:
Austrian Geoid 2008. Accuracy 5cm (1 sigma). The transformation is implemented in BEV-Transformator. For reversible alternative to this transformation see ETRS89 to ETRS89 + EVRF2000 Austria height (1) (code 9600).


auth_name: EPSG
name: MGI to EVRF2000 Austria height (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (BEV AT)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: GEOID_BESSEL_Oesterreich.csv
interpolation_crs_auth_name: EPSG
operation_version: BEV-Aut
description:
Austrian Geoid 2008 (Bessel ellipsoid). Accuracy 5cm (1 sigma). The transformation is implemented in BEV-Transformator. For reversible alternative to this transformation see MGI to MGI + EVRF2000 Austria height (1) (code 9601).


auth_name: EPSG
name: ETRS89 to GHA height (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (BEV AT)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: GV_Hoehengrid_plus_Geoid_V3.csv
interpolation_crs_auth_name: EPSG
operation_version: BEV-Aut
description:
This transformation gives same result as concatenation of ETRS89 to EVRF2000 Austria height and EVRF2000 Austria height to GHA height transformations, CTs code 9276 and 9275. Accuracy 5cm (1 sigma). The transformation is implemented in BEV-Transformator.


auth_name: EPSG
name: ITRF2005 to SA LLD height (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (txt)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: SAGEOID2010.dat
operation_version: NGI-Zaf
description:
Hybrid geoid referenced to ITRF2005@2010.02. Accuracy 7cm at 1 sigma. For reversible alternative to this transformation see ITRF2005 to ITRF2005 + SA LLD height (1) (code 9643).


auth_name: EPSG
name: Amersfoort to ETRS89 (9)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: rdtrans2018.gsb
operation_version: NSGI-Nld 2018
description:
Replaces Amersfoort to ETRS89 (7) (tfm code 7000). Horizontal component of official transformation RDNAPTRANS(TM)2018.


auth_name: EPSG
name: ETRS89 to NAP height (2)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (gtx)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: nlgeo2018.gtx
operation_version: NSGI-Nld 2018
description:
Vertical component of official transformation RDNAPTRANS(TM)2018. Replaces earlier versions of RDNAPTRANS(TM). For reversible alternative to this transformation see ETRS89 to ETRS89 + NAP height (2) (code 9597).


auth_name: EPSG
name: HS2-IRF to ETRS89 (1)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: HS2TN15_NTv2.gsb
operation_version: HS2-Gbr OSNet2009
description:
In conjunction with the HS2-TM projection (code 9301), emulates zero-distortion HS2P1+14 Snake projection. For use with OSNet v2009 CORS. Supersedes HS2TN02 used with OSNet v2001. Derived at 350000 locations, RMS 0.15 mm; this is considered errorless.


auth_name: EPSG
name: ETRS89 to HS2-VRF height (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (EGM)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: HS2GM15W.grd
operation_version: HS2-Gbr HS2GM15 W
description:
Defines HS2-VRF using OSNet v2009. Full grid also available in a single file in each of Leica, Topcon and Trimble formats.


auth_name: EPSG
name: SRGI2013 to INAGeoid2020 v1 height (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (gtx)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: INAGEOID2020v1.gtx
operation_version: BIG-Idn INAGeoid20 v1
description:
Defines INAGeoid2020 v1 reference surface and as such is considered to be errorless. Internal accuracy is between 0.05 and 0.24m on the large islands of Indonesia. Replaced by INAGeoid2020 v2 (CT code 20043). Before 2022, v1 file name was INAGEOID20.gtx.


auth_name: EPSG
name: DHDN to ETRS89 (10)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: SeTa2016.gsb
operation_version: LVGL-Deu SL 2016
description:
Replaces SeTa2009 from 2018-01-15. Derived using the 2016 implementation of ETRS89 / DREF91 and DHHN2016. Coincident with the transformation of cadastral data from DHDN to ETRS89 used by LVGL at a level of 1-2 mm.


auth_name: EPSG
name: NZVD2016 height to Auckland 1946 height (2)
method_auth_name: EPSG
method_name: Vertical Offset by Grid Interpolation (gtx)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Vertical offset file
grid_name: auckht1946-nzvd2016.gtx
interpolation_crs_auth_name: EPSG
operation_version: LINZ-NZ AUCK gtx
description:
Derived at 260 control points. Mean offset 0.292m, standard deviation 0.029m, maximum difference from mean 0.075m. Supersedes NZVD2016 height to Auckland 1946 height (1) (code 7860) after change of grid file format.


auth_name: EPSG
name: NZVD2016 height to Bluff 1955 height (2)
method_auth_name: EPSG
method_name: Vertical Offset by Grid Interpolation (gtx)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Vertical offset file
grid_name: blufht1955-nzvd2016.gtx
interpolation_crs_auth_name: EPSG
operation_version: LINZ-NZ BLUF gtx
description:
Derived at 71 control points. Mean offset 0.273m, standard deviation 0.034m, maximum difference from mean 0.079m. Supersedes NZVD2016 height to Bluff 1955 height (1) (code 7861) after change of grid file format.


auth_name: EPSG
name: NZVD2016 height to Dunedin 1958 height (2)
method_auth_name: EPSG
method_name: Vertical Offset by Grid Interpolation (gtx)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Vertical offset file
grid_name: duneht1958-nzvd2016.gtx
interpolation_crs_auth_name: EPSG
operation_version: LINZ-NZ DUNE gtx
description:
Derived at 197 control points. Mean offset 0.326m, standard deviation 0.043m, maximum difference from mean 0.152m. Supersedes NZVD2016 height to Dunedin 1958 height (1) (code 7862) after change of grid file format.


auth_name: EPSG
name: NZVD2016 height to Dunedin-Bluff 1960 height (2)
method_auth_name: EPSG
method_name: Vertical Offset by Grid Interpolation (gtx)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Vertical offset file
grid_name: dublht1960-nzvd2016.gtx
interpolation_crs_auth_name: EPSG
operation_version: LINZ-NZ DUBL gtx
description:
Derived at 205 control points. Mean offset 0.254m, standard deviation 0.039m, maximum difference from mean 0.11m. Supersedes NZVD2016 height to Dunedin-Bluff 1960 height (1) (code 7863) after change of grid file format.


auth_name: EPSG
name: NZVD2016 height to Gisborne 1926 height (2)
method_auth_name: EPSG
method_name: Vertical Offset by Grid Interpolation (gtx)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Vertical offset file
grid_name: gisbht1926-nzvd2016.gtx
interpolation_crs_auth_name: EPSG
operation_version: LINZ-NZ GISB gtx
description:
Derived at 274 control points. Mean offset 0.343m, standard deviation 0.025m, maximum difference from mean 0.09m. Supersedes NZVD2016 height to Gisborne 1926 height (1) (code 7864) after change of grid file format.


auth_name: EPSG
name: NZVD2016 height to Lyttelton 1937 height (2)
method_auth_name: EPSG
method_name: Vertical Offset by Grid Interpolation (gtx)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Vertical offset file
grid_name: lyttht1937-nzvd2016.gtx
interpolation_crs_auth_name: EPSG
operation_version: LINZ-NZ LYTT gtx
description:
Derived at 923 control points. Mean offset 0.34m, standard deviation 0.041m, maximum difference from mean 0.149m. Supersedes NZVD2016 height to Lyttelton 1937 height (1) (code 7865) after change of grid file format.


auth_name: EPSG
name: NZVD2016 height to Moturiki 1953 height (2)
method_auth_name: EPSG
method_name: Vertical Offset by Grid Interpolation (gtx)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Vertical offset file
grid_name: motuht1953-nzvd2016.gtx
interpolation_crs_auth_name: EPSG
operation_version: LINZ-NZ MOTU gtx
description:
Derived at 519 control points. Mean offset 0.309m, standard deviation 0.071m, maximum difference from mean 0.231m. Supersedes NZVD2016 height to Moturiki 1953 height (1) (code 7866) after change of grid file format.


auth_name: EPSG
name: NZVD2016 height to Napier 1962 height (2)
method_auth_name: EPSG
method_name: Vertical Offset by Grid Interpolation (gtx)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Vertical offset file
grid_name: napiht1962-nzvd2016.gtx
interpolation_crs_auth_name: EPSG
operation_version: LINZ-NZ NAPI gtx
description:
Derived at 207 control points. Mean offset 0.203m, standard deviation 0.034m, maximum difference from mean 0.096m. Supersedes NZVD2016 height to Napier 1962 height (1) (code 7867) after change of grid file format.


auth_name: EPSG
name: NZVD2016 height to Nelson 1955 height (2)
method_auth_name: EPSG
method_name: Vertical Offset by Grid Interpolation (gtx)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Vertical offset file
grid_name: nelsht1955-nzvd2016.gtx
interpolation_crs_auth_name: EPSG
operation_version: LINZ-NZ NELS gtx
description:
Derived at 256 control points. Mean offset 0.329m, standard deviation 0.039m, maximum difference from mean 0.114m. Supersedes NZVD2016 height to Nelson 1955 height (1) (code 7868) after change of grid file format.


auth_name: EPSG
name: NZVD2016 height to One Tree Point 1964 height (2)
method_auth_name: EPSG
method_name: Vertical Offset by Grid Interpolation (gtx)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Vertical offset file
grid_name: ontpht1964-nzvd2016.gtx
interpolation_crs_auth_name: EPSG
operation_version: LINZ-NZ ONTP gtx
description:
Derived at 137 control points. Mean offset 0.077m, standard deviation 0.042m, maximum difference from mean 0.107m. Supersedes NZVD2016 height to One Tree Point 1964 height (1) (code 7869) after change of grid file format.


auth_name: EPSG
name: NZVD2016 height to Stewart Island 1977 height (2)
method_auth_name: EPSG
method_name: Vertical Offset by Grid Interpolation (gtx)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Vertical offset file
grid_name: stisht1977-nzvd2016.gtx
interpolation_crs_auth_name: EPSG
operation_version: LINZ-NZ STWT gtx
description:
Derived at 4 control points. Mean offset 0.299m, standard deviation 0.025m, maximum difference from mean 0.039m. Supersedes NZVD2016 height to Stewart Island 1977 height (1) (code 7870) after change of grid file format.


auth_name: EPSG
name: NZVD2016 height to Taranaki 1970 height (2)
method_auth_name: EPSG
method_name: Vertical Offset by Grid Interpolation (gtx)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Vertical offset file
grid_name: taraht1970-nzvd2016.gtx
interpolation_crs_auth_name: EPSG
operation_version: LINZ-NZ TARA gtx
description:
Derived at 125 control points. Mean offset 0.286m, standard deviation 0.026m, maximum difference from mean 0.07m. Supersedes NZVD2016 height to Taranaki 1970 height (1) (code 7871) after change of grid file format.


auth_name: EPSG
name: NZVD2016 height to Wellington 1953 height (2)
method_auth_name: EPSG
method_name: Vertical Offset by Grid Interpolation (gtx)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Vertical offset file
grid_name: wellht1953-nzvd2016.gtx
interpolation_crs_auth_name: EPSG
operation_version: LINZ-NZ WGTN gtx
description:
Derived at 137 control points. Mean offset 0.408m, standard deviation 0.054m, maximum difference from mean 0.112m. Supersedes NZVD2016 height to Wellington 1953 height (1) (code 7872) after change of grid file format.


auth_name: EPSG
name: NZGD2000 to NZVD2009 height (2)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (gtx)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: nzgeoid2009.gtx
operation_version: LINZ-NZ 2009 gtx
description:
Defines NZVD2009 vertical datum (datum code 1039, CRS code 4440). Supersedes NZGD2000 to NZVD2009 height (1) (code 4459) after change of grid file format. For reversible alternative to this CT see NZGD2000 to NZGD2000 + NZVD2009 height (2) (code 9627).


auth_name: EPSG
name: NZGD2000 to NZVD2016 height (2)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (gtx)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: nzgeoid2016.gtx
operation_version: LINZ-NZ 2016 gtx
description:
Defines NZVD2016 vertical datum (datum code 1169, CRS code 7839). Supersedes NZGD2000 to NZVD2016 height (1) (code 7840) after change of grid file format. For reversible alternative to this CT see NZGD2000 to NZGD2000 + NZVD2016 height (2) (code 9628).


auth_name: EPSG
name: NTF to RGF93 v1 (1)
method_auth_name: EPSG
method_name: Geocentric translation by Grid Interpolation (IGN)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geocentric translation file
grid_name: gr3df97a.txt
interpolation_crs_auth_name: EPSG
operation_version: IGN-Fra 1m
description:
May be emulated using NTv2 method - see tfm code 15958. Also used to transform between NTF and later realizations of RGF93.


auth_name: EPSG
name: NEA74 Noumea to RGNC91-93 (3)
method_auth_name: EPSG
method_name: Geocentric translation by Grid Interpolation (IGN)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geocentric translation file
grid_name: gr3dnc03a.mnt
interpolation_crs_auth_name: EPSG
operation_version: BGN-Ncl 0.05m
description:
Developed in July 2002 and officially adopted in August 2005. May be emulated using NTv2 method - see RGNC91-93 to NEA74 Noumea (4) (code 1295).


auth_name: EPSG
name: IGN72 Grande Terre to RGNC91-93 (4)
method_auth_name: EPSG
method_name: Geocentric translation by Grid Interpolation (IGN)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geocentric translation file
grid_name: gr3dnc01b.mnt
interpolation_crs_auth_name: EPSG
operation_version: BGN-Ncl 0.1m
description:
Developed in July 2002 and officially adopted in August 2005. May be emulated using NTv2 method - see RGNC91-93 to IGN72 Grande Terre (6) (code 15962).


auth_name: EPSG
name: DHDN to ETRS89 (9)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: BWTA2017.gsb
operation_version: LGL-Deu BWTA2017
description:
Official transformation for the state of Baden-Württemberg. Used in ATKIS (Amtliches Topographisch-Kartographisches Informationssystem [Official Topographic and Cartographic Information System]).


auth_name: EPSG
name: RGNC91-93 to NGNC08 height (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (IGN2009)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: Ranc08_Circe.mnt
operation_version: BGN-Ncl RANC08
description:
Geoid model RANC08 realizes NGNC08 height (CRS code 9351) to a precision of 2-5cm. For reversible alternative to this transformation see RGNC91-93 to RGNC91-93 + NGNC08 height (1) (code 9640).


auth_name: EPSG
name: KSA-GRF17 to KSA-VRF14 height (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (Gravsoft)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: KSA-GEOID17.gra
operation_version: GCS-Sau
description:
Hybrid geoid, grid resolution 0.02° lat x 0.025° lon. Accuracy ~2 cm in Eastern region and ~10-20 cm in rest of KSA. File also available in IGN2009 format. To access KSA-GEOID17 contact GCS at info@gcs.gov.sa. For reversible alternative see code 9620.


auth_name: EPSG
name: ETRS89 to TPEN11-IRF (1)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: TN15-ETRS89-to-TPEN11-IRF.gsb
operation_version: NR-Gbr TPEN11 OSNet2009
description:
In conjunction with the TPEN11-TM map projection (code 9366) applied to TPEN11-IRF (code 9364), emulates the TPEN11 Snake and TPEN11ext Snake projections. Applied to ETRS89 (as realized through the OSNet v2009 CORS) defines TPEN11-IRF hence is errorless.


auth_name: EPSG
name: ETRS89 to MML07-IRF (1)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: TN15-ETRS89-to-MML07-IRF.gsb
operation_version: NR-Gbr MML07 OSNet2009
description:
In conjunction with the MML07-TM map projection (code 9370) applied to MML07-IRF (code 9372), emulates the MML07 Snake projection. Applied to ETRS89 (as realized through the OSNet v2009 CORS) defines MML07-IRF hence is errorless.


auth_name: EPSG
name: ETRS89 to AbInvA96_2020-IRF (1)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: TN15-ETRS89-to-AbInvA96_2020-IRF.gsb
operation_version: TS-Gbr A96 OSNet2009
description:
In conjunction with AbInvA96_2020-TM map projection (code 9385) applied to AbInvA96_2020-IRF (code 9384), emulates the AbInvA96_2020 Snake projection. Applied to ETRS89 (as realized through the OSNet v2009) defines AbInvA96_2020-IRF hence is errorless.


auth_name: EPSG
name: ETRS89 to Alicante height (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (EGM2008)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: EGM08_REDNAP.txt
operation_version: IGN-Esp 2008
description:
For reversible alternative to this transformation see ETRS89 to ETRS89 + Alicante height (1) (code 9605).


auth_name: EPSG
name: ETRS89 to Mallorca height (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (EGM2008)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: EGM08_REDNAP.txt
operation_version: IGN-Esp 2008
description:
For reversible alternative to this transformation see ETRS89 to ETRS89 + Mallorca height (1) (code 9608).


auth_name: EPSG
name: ETRS89 to Menorca height (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (EGM2008)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: EGM08_REDNAP.txt
operation_version: IGN-Esp 2008
description:
For reversible alternative to this transformation see ETRS89 to ETRS89 + Menorca height (1) (code 9609).


auth_name: EPSG
name: ETRS89 to Ceuta 2 height (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (EGM2008)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: EGM08_REDNAP.txt
operation_version: IGN-Esp 2008
description:
For reversible alternative to this transformation see ETRS89 to ETRS89 + Ceuta 2 height (1) (code 9606).


auth_name: EPSG
name: REGCAN95 to Lanzarote height (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (EGM2008)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: EGM08_REDNAP_Canarias.txt
operation_version: IGN-Esp 2008
description:
For reversible alternative to this transformation see REGCAN95 to REGCAN95 + Lanzarote height (1) (code 9615).


auth_name: EPSG
name: REGCAN95 to Fuerteventura height (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (EGM2008)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: EGM08_REDNAP_Canarias.txt
operation_version: IGN-Esp 2008
description:
For reversible alternative to this transformation see REGCAN95 to REGCAN95 + Fuerteventura height (1) (code 9611).


auth_name: EPSG
name: REGCAN95 to Gran Canaria height (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (EGM2008)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: EGM08_REDNAP_Canarias.txt
operation_version: IGN-Esp 2008
description:
For reversible alternative to this transformation see REGCAN95 to REGCAN95 + Gran Canaria height (1) (code 9612).


auth_name: EPSG
name: REGCAN95 to La Gomera height (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (EGM2008)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: EGM08_REDNAP_Canarias.txt
operation_version: IGN-Esp 2008
description:
For reversible alternative to this transformation see REGCAN95 to REGCAN95 + La Gomera height (1) (code 9613).


auth_name: EPSG
name: REGCAN95 to La Palma height (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (EGM2008)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: EGM08_REDNAP_Canarias.txt
operation_version: IGN-Esp 2008
description:
For reversible alternative to this transformation see REGCAN95 to REGCAN95 + La Palma height (1) (code 9614).


auth_name: EPSG
name: REGCAN95 to El Hierro height (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (EGM2008)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: EGM08_REDNAP_Canarias.txt
operation_version: IGN-Esp 2008
description:
For reversible alternative to this transformation see REGCAN95 to REGCAN + El Hierro height (1) (code 9610).


auth_name: EPSG
name: ETRS89 to GBK19-IRF (1)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: TN15-ETRS89-to-GBK19-IRF.gsb
operation_version: NR-Gbr GBK19 OSNet2009
description:
In conjunction with the GBK19-TM map projection (code 9455) applied to GBK19-IRF (code 9453), emulates the GBK19 Snake projection. Applied to ETRS89 (as realized through the OSNet v2009 CORS) defines GBK19-IRF hence is errorless.


auth_name: EPSG
name: GDA2020 to AVWS height (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (AUSGeoid v2)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: AGQG_20191107.gsb
operation_version: GA-Aus AGQG 20191107
description:
AGQG is used to realise AVWS. Uncertainties (4-8 cm across mainland Australia) given in accompanying file AGQG_uncertainty_20191107.gsb. For reversible alternative to this transformation see GDA2020 to GDA2020 + AVWS height (1) (code 9465).


auth_name: EPSG
name: GDA2020 to GDA2020 + AVWS height (1)
method_auth_name: EPSG
method_name: Geog3D to Geog2D+GravityRelatedHeight (AUSGeoidv2)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: AGQG_20191107.gsb
interpolation_crs_auth_name: EPSG
operation_version: GA-Aus AGQG 20191107
description:
Reversible alternative to GDA2020 to AVWS height (1) (code 9461). AGQG is used to realise AVWS. Uncertainties (4-8 cm across mainland Australia) given in accompanying file AGQG_uncertainty_20191107.gsb.


auth_name: EPSG
name: GDA2020 to GDA2020 + AHD height (1)
method_auth_name: EPSG
method_name: Geog3D to Geog2D+GravityRelatedHeight (AUSGeoidv2)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: AUSGeoid2020_20180201.gsb
interpolation_crs_auth_name: EPSG
operation_version: GA-Aus 2020
description:
Reversible alternative to GDA2020 to AHD height (1) (code 8451). Uncertainties given in accompanying file AUSGeoid2020_20180201_error.gsb


auth_name: EPSG
name: GDA94 to GDA94 + AHD height (1)
method_auth_name: EPSG
method_name: Geog3D to Geog2D+GravityRelatedHeight (AUSGeoidv2)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: AUSGeoid09_V1.01.gsb
interpolation_crs_auth_name: EPSG
operation_version: GA-Aus09
description:
Reversible alternative to GDA94 to AHD height (1) (code 5656). Uses AUSGeoid09 model which uses bi-cubic interpolation; bi-linear interpolation of the grid file will give results agreeing to within 1cm 99.97% of the time.


auth_name: EPSG
name: Canada velocity grid v7
method_auth_name: EPSG
method_name: Point motion by grid (Canada NTv2_Vel)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Point motion velocity grid file
grid_name: NAD83v70VG.gvb
operation_version: NRC-Can cvg7.0
description:
File initially published with name cvg70.cvb, later renamed to NAD83v70VG.gvb with no change of content.


auth_name: EPSG
name: ETRS89 to NN54 height (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (Gravsoft)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: href2008a.bin
operation_version: SK-Nor 2008
description:
For reversible alternative to this transformation see ETRS89 to ETRS89 + NN54 height (1) (code 9594).


auth_name: EPSG
name: ETRS89 to NN2000 height (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (Gravsoft)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: HREF2018B_NN2000_EUREF89.bin
operation_version: SK-Nor 2018
description:
For reversible alternative to this transformation see ETRS89 to ETRS89 + NN2000 height (1) (code 9593).


auth_name: EPSG
name: NAD83 to NAD83(CSRS)v6 (10)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: NLCSRSV4A.GSB
operation_version: CGS-Can Nfl island
description:
File NLCSRSV4A.GSB corrects error in file header record previously released as NLCSRSV4.GSB. No change to gridded data.


auth_name: EPSG
name: NAD83(2011) to NAD83(2011) + NAVD88 height (3)
method_auth_name: EPSG
method_name: Geog3D to Geog2D+GravityRelatedHeight (gtx)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: g2018u0.bin
interpolation_crs_auth_name: EPSG
operation_version: NGS-US Conus 18
description:
Reversible alternative to NAD83(2011) to NAVD88 height (3) (code 9229). Uses Geoid18 hybrid model. Replaces 12B model. See information source for further information.


auth_name: EPSG
name: GR96 to GR96 + GVR2000 height (1)
method_auth_name: EPSG
method_name: Geog3D to Geog2D+GravityRelatedHeight (Gravsoft)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: gr2000g.gri
interpolation_crs_auth_name: EPSG
operation_version: SDFE-Grl
description:
Reversible alternative to GR96 to GVR2000 height (1) (code 8268). File is also available in NOAA VDatum format (ggeoid2000.gtx) and GeoTIFF format (ggeoid2000.tif).


auth_name: EPSG
name: GR96 to GR96 + GVR2016 height (1)
method_auth_name: EPSG
method_name: Geog3D to Geog2D+GravityRelatedHeight (Gravsoft)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: ggeoid16.gri
interpolation_crs_auth_name: EPSG
operation_version: SDFE-Grl
description:
Reversible alternative to GR96 to GVR2016 height (1) (code 8269). File is also available in NOAA VDatum format (ggeoid2016.gtx) and GeoTIFF format (ggeoid2016.tif).


auth_name: EPSG
name: ETRS89 to ETRS89 + EVRF2000 Austria height (1)
method_auth_name: EPSG
method_name: Geog3D to Geog2D+GravityRelatedHeight (BEV AT)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: GEOID_GRS80_Oesterreich.csv
interpolation_crs_auth_name: EPSG
operation_version: BEV-Aut
description:
Reversible alternative to ETRS89 to EVRF2000 Austria height (1) (code 9276). Austrian Geoid 2008. Accuracy 5cm (1 sigma). The transformation is implemented in BEV-Transformator.


auth_name: EPSG
name: MGI to MGI + EVRF2000 Austria height (1)
method_auth_name: EPSG
method_name: Geog3D to Geog2D+GravityRelatedHeight (BEV AT)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: GEOID_BESSEL_Oesterreich.csv
interpolation_crs_auth_name: EPSG
operation_version: BEV-Aut
description:
Reversible alternative to MGI to EVRF2000 Austria height (1) (code 9277). Austrian Geoid 2008 (Bessel ellipsoid). Accuracy 5cm (1 sigma). The transformation is implemented in BEV-Transformator.


auth_name: EPSG
name: CIGD11 to CIGD11 + CBVD61 height (ft) (1)
method_auth_name: EPSG
method_name: Geog3D to Geog2D+GravityRelatedHeight (CI)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: CBGM0811.TXT
interpolation_crs_auth_name: EPSG
operation_version: LSD-Cym
description:
Reversible alternative to CIGD11 to CBVD61 height (ft) (1) (code 6140). Care: source CRS heights are in metres, transformation file parameter values and target CRS heights are in feet.


auth_name: EPSG
name: CIGD11 to CIGD11 + GCVD54 height (ft) (1)
method_auth_name: EPSG
method_name: Geog3D to Geog2D+GravityRelatedHeight (CI)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: GCGM0811.TXT
interpolation_crs_auth_name: EPSG
operation_version: LSD-Cym
description:
Reversible alternative to CIGD11 to GCVD54 height (ft) (1) (code 6138). Care: source CRS heights are in metres, transformation file parameter values and target CRS heights are in feet.


auth_name: EPSG
name: CIGD11 to CIGD11 + LCVD61 height (ft) (1)
method_auth_name: EPSG
method_name: Geog3D to Geog2D+GravityRelatedHeight (CI)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: LCGM0811.TXT
interpolation_crs_auth_name: EPSG
operation_version: LSD-Cym
description:
Reversible alternative to CIGD11 to LCVD61 height (ft) (1) (code 6139). Care: source CRS heights are in metres, transformation file parameter values and target CRS heights are in feet.


auth_name: EPSG
name: KSA-GRF17 to KSA-GRF17 + KSA-VRF14 height (1)
method_auth_name: EPSG
method_name: Geog3D to Geog2D+GravityRelatedHeight (Gravsoft)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: KSA-GEOID17.gra
interpolation_crs_auth_name: EPSG
operation_version: GCS-Sau
description:
Reversible alternative to KSA-GRF17 to KSA-VRF14 height (1) (code 9355). File also available in IGN2009 format. To access KSA-GEOID17 contact GCS by email to info@gcs.gov.sa


auth_name: EPSG
name: POSGAR 2007 to POSGAR 2007 + SRVN16 height (1)
method_auth_name: EPSG
method_name: Geog3D to Geog2D+GravityRelatedHeight (Gravsoft)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: GEOIDE-Ar16.gri
interpolation_crs_auth_name: EPSG
operation_version: IGN-Arg
description:
Reversible alternative to POSGAR 2007 to SRVN16 height (1) (code 9256). Uses geoid model Ar16. See information source for more information.


auth_name: EPSG
name: NAD83(2011) to NAD83(2011) + PRVD02 height (2)
method_auth_name: EPSG
method_name: Geog3D to Geog2D+GravityRelatedHeight (gtx)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: g2018p0.bin
interpolation_crs_auth_name: EPSG
operation_version: NGS-Pri 18
description:
Reversible alternative to NAD83(2011) to PRVD02 height (2) (code 9230). Uses Geoid18 hybrid model. Replaces 12B model. See information source for further information.


auth_name: EPSG
name: NAD83(2011) to NAD83(2011) + VIVD09 height (2)
method_auth_name: EPSG
method_name: Geog3D to Geog2D+GravityRelatedHeight (gtx)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: g2018p0.bin
interpolation_crs_auth_name: EPSG
operation_version: NGS-Vir 18
description:
Reversible alternative to NAD83(2011) to VIVD09 height (2) (code 9231). Uses Geoid18 hybrid model. Replaces 12B model. See information source for further information.


auth_name: EPSG
name: NAD83(MA11) to NAD83(MA11) + GUVD04 height (1)
method_auth_name: EPSG
method_name: Geog3D to Geog2D+GravityRelatedHeight (gtx)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: g2012bg0.bin
interpolation_crs_auth_name: EPSG
operation_version: NGS-Gum 12B
description:
Reversible alternative to NAD83(MA11) to GUVD04 height (1) (code 7648). Uses Geoid12B hybrid model. See information source for further information.


auth_name: EPSG
name: NAD83(MA11) to NAD83(MA11) + NMVD03 height (1)
method_auth_name: EPSG
method_name: Geog3D to Geog2D+GravityRelatedHeight (gtx)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: g2012bg0.bin
interpolation_crs_auth_name: EPSG
operation_version: NGS-Mnp 12B
description:
Reversible alternative to NAD83(MA11) to NMVD03 height (1) (code 7649). Uses Geoid12B hybrid model. See information source for further information.


auth_name: EPSG
name: NAD83(PA11) to NAD83(PA11) + ASVD02 height (1)
method_auth_name: EPSG
method_name: Geog3D to Geog2D+GravityRelatedHeight (gtx)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: g2012bs0.bin
interpolation_crs_auth_name: EPSG
operation_version: NGS-Asm 12B
description:
Reversible alternative to NAD83(PA11) to ASVD02 height (1) (code 7650). Uses Geoid12B hybrid model. See information source for further information.


auth_name: EPSG
name: SRGI2013 to SRGI2013 + INAGeoid2020 v1 height (1)
method_auth_name: EPSG
method_name: Geog3D to Geog2D+GravityRelatedHeight (gtx)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: INAGEOID2020v1.gtx
interpolation_crs_auth_name: EPSG
operation_version: BIG-Idn INAGeoid20 v1
description:
Reversible alternative to SRGI2013 to INAGeoid2020 v1 height (1) (code 9305). Before 2022-07, file name was INAGEOID20.gtx.


auth_name: EPSG
name: RGF93 v2 to RGF93 v2 + NGF-IGN69 height (3)
method_auth_name: EPSG
method_name: Geog3D to Geog2D+GravityRelatedHeight (IGN2009)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: RAF18.mnt
interpolation_crs_auth_name: EPSG
operation_version: IGN Fra 18
description:
Reversible alternative to RGF93 v2 to NGF-IGN69 height (3) (code 8885). May also be found with filename RAF18.tac.


auth_name: EPSG
name: Baltic 1986 height to EVRF2019 height (1)
method_auth_name: EPSG
method_name: Vertical Offset by Grid Interpolation (asc)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Vertical offset file
grid_name: pl86_2019z.asc
interpolation_crs_auth_name: EPSG
operation_version: EuG-Pol 2019z 2020-09
description:
Determined at 300 points, SD 0.010m. Offset: mean 0.178m, minimum 0.144m, maximum 0.203m. May also use CRS 9702 (ETRF2000-PL) as interpolation CRS.


auth_name: EPSG
name: Baltic 1986 height to EVRF2019 mean-tide height (1)
method_auth_name: EPSG
method_name: Vertical Offset by Grid Interpolation (asc)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Vertical offset file
grid_name: pl86_2019m.asc
interpolation_crs_auth_name: EPSG
operation_version: EuG-Pol 2019m 2020-09
description:
Determined at 300 points, SD 0.010m. Offset: mean 0.176m, minimum 0.133m, maximum 0.201m. May also use CRS 9702 (ETRF2000-PL) as interpolation CRS.


auth_name: EPSG
name: EVRF2007-PL height to EVRF2019 height (1)
method_auth_name: EPSG
method_name: Vertical Offset by Grid Interpolation (asc)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Vertical offset file
grid_name: pl07_2019z.asc
interpolation_crs_auth_name: EPSG
operation_version: EuG-Pol 2019z 2020-09
description:
Determined at 319 points, SD 0.003m. Offset: mean 0.012m, minimum 0.002m, maximum 0.024m. May also use CRS 9702 (ETRF2000-PL) as interpolation CRS.


auth_name: EPSG
name: EVRF2000-PL height to EVRF2019 mean-tide height (1)
method_auth_name: EPSG
method_name: Vertical Offset by Grid Interpolation (asc)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Vertical offset file
grid_name: pl07_2019m.asc
interpolation_crs_auth_name: EPSG
operation_version: EuG-Pol 2019m 2020-09
description:
Determined at 319 points, SD 0.006m. Offset: mean 0.011m, minimum -0.006m, maximum 0.022m. May also use CRS 9702 (ETRF2000-PL) as interpolation CRS.


auth_name: EPSG
name: ETRF2000-PL to Baltic 1986 height (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (PL txt)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: gugik-geoid2011-PL-KRON86-NH.txt
operation_version: GUGiK-Pol geoid11 KRON86
description:
For reversible alternative to this transformation see ETRF2000-PL to ETRF2000-PL + Baltic 1986 height (1) (code 9659).


auth_name: EPSG
name: ETRF2000-PL to EVRF2007-PL height (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (PL txt)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: gugik-geoid2011-PL-EVRF2007-NH.txt
operation_version: GUGiK-Pol geoid11 EVRF07
description:
For reversible alternative to this transformation see ETRF2000-PL to ETRF2000-PL + EVRF2007-PL height (1) (code 9661).


auth_name: EPSG
name: Baltic 1986 height to EVRF2007-PL height (1)
method_auth_name: EPSG
method_name: Vertical Offset by Grid Interpolation (PL txt)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Vertical offset file
grid_name: gugik-evrf2007.txt
interpolation_crs_auth_name: EPSG
operation_version: GUGiK-Pol
description:
Gives same result as differencing quasi-geoid models geoid2011-KRON86 and geoid2011-EVRF2007 (transformations 9658 and 9660).


auth_name: EPSG
name: GDA94 to WGS 84 (3)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: GDA94_GDA2020_conformal_and_distortion.gsb
operation_version: ICSM-Aus Conf and Dist
description:
Equivalent to concatenation of CT 8447 and null CT 8450 through GDA2020. See GDA94 to WGS 84 (2) (CT code 9688) for conformal-only alternative (i.e. without distortion modelling).


auth_name: EPSG
name: WGS 84 to GDA2020 (4)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: GDA94_GDA2020_conformal_and_distortion.gsb
operation_version: ICSM-Aus Conf and Dist
description:
Equivalent to concatenation of null CT 1150 and CT 8447 through GDA94. See WGS 84 to GDA94 (3) (CT code 9690) for conformal-only alternative (i.e. without distortion modelling).


auth_name: EPSG
name: GDA2020 to AVWS height (2)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (AUSGeoid v2)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: AGQG_20201120.gsb
operation_version: GA-Aus AGQG 20201120
description:
AGQG is used to realise AVWS. Uncertainties (4-8 cm across mainland Australia) given in accompanying file AGQG_uncertainty_20201120.gsb. For reversible alternative to this transformation see GDA2020 to GDA2020 + AVWS height (2) (code 9693).


auth_name: EPSG
name: GDA2020 to GDA2020 + AVWS height (2)
method_auth_name: EPSG
method_name: Geog3D to Geog2D+GravityRelatedHeight (AUSGeoidv2)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: AGQG_20201120.gsb
interpolation_crs_auth_name: EPSG
operation_version: GA-Aus AGQG 20201120
description:
Reversible alternative to GDA2020 to AVWS height (1) (code 9692). AGQG is used to realise AVWS. Uncertainties (4-8 cm across mainland Australia) given in accompanying file AGQG_uncertainty_20201120.gsb.


auth_name: EPSG
name: WGS 84 to WGS 84 + MSL height (1)
method_auth_name: EPSG
method_name: Geog3D to Geog2D+GravityRelatedHeight (EGM2008)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: Und_min1x1_egm2008_isw=82_WGS84_TideFree.gz
interpolation_crs_auth_name: EPSG
operation_version: IOGP-World
description:
Reversible alternative to WGS 84 to MSL height (1) (code 8037). Parameter values are from WGS 84 to WGS 84 + EGM2008 height (2) (CT code 9618) assuming that the EGM2008 surface equals MSL surface within the accuracy of the transformation.


auth_name: EPSG
name: ETRF2000-PL to Baltic 1986 height (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (PL txt)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: gugik-geoid2011-PL-KRON86-NH.txt
operation_version: GUGiK-Pol geoid11 KRON86
description:
For reversible alternative to this transformation see ETRF2000-PL to ETRF2000-PL + Baltic 1986 height (1) (code 9718).


auth_name: EPSG
name: ETRF2000-PL to EVRF2007-PL height (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (PL txt)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: gugik-geoid2011-PL-EVRF2007-NH.txt
operation_version: GUGiK-Pol geoid11 EVRF07
description:
For reversible alternative to this transformation see ETRF2000-PL to ETRF2000-PL + EVRF2007-PL height (1) (code 9720).


auth_name: EPSG
name: ETRS89 to Genoa 1942 height (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (ITAL2005)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: geo_igm_mar06.grd
operation_version: IGM-Ita 2005 main Sic
description:
Replaces ITALGEO99. For reversible alternative to this transformation see ETRS89 to ETRS89+ Genoa 1942 height (1) (code 9729).


auth_name: EPSG
name: ETRS89 to Cagliari 1956 height (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (ITAL2005)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: geo_igm_mar06.grd
operation_version: IGM-Ita 2005 Sardinia
description:
For reversible alternative to this transformation see ETRS89 to ETRS89 + Cagliari 1956 height (1) (code 9730).


auth_name: EPSG
name: Monte Mario to ED50 (1)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: 35160622_47161840_R40_E50.gsb
operation_version: IGM-Ita
description:
For the reverse transformation from ED50 to Monte Mario, iteration may be avoided by using an alternative grid file (35160622_47161840_E50_R40.gsb).


auth_name: EPSG
name: Monte Mario to IGM95 (4)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: 35160622_47161840_R40_F89.gsb
operation_version: IGM-Ita
description:
For the reverse transformation from IGM95 to Monte Mario, iteration may be avoided by using an alternative grid file (35160622_47161840_F89_R40.gsb).


auth_name: EPSG
name: Monte Mario to RDN2008 (5)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: 35160622_47161840_R40_F00.gsb
operation_version: IGM-Ita
description:
For the reverse transformation from RDN2008 to Monte Mario, iteration may be avoided by using an alternative grid file (35160622_47161840_F00_R40.gsb).


auth_name: EPSG
name: ED50 to IGM95 (1)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: 35160622_47161840_E50_F89.gsb
operation_version: IGM-Ita
description:
For the reverse transformation from IGM95 to ED50, iteration may be avoided by using an alternative grid file (35160622_47161840_F89_E50.gsb).


auth_name: EPSG
name: ED50 to RDN2008 (1)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: 35160622_47161840_E50_F00.gsb
operation_version: IGM-Ita
description:
For the reverse transformation from RDN2008 to ED50, iteration may be avoided by using an alternative grid file (35160622_47161840_F00_E50.gsb).


auth_name: EPSG
name: IGM95 to RDN2008 (1)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: 35160622_47161840_F89_F00.gsb
operation_version: IGM-Ita
description:
For the reverse transformation from RDN2008 to IGM95, iteration may be avoided by using an alternative grid file (35160622_47161840_F00_F89.gsb).


auth_name: EPSG
name: ETRS89 to EOS21-IRF (1)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: TN15-ETRS89-to-EOS21-IRF.gsb
operation_version: NR-Gbr EOS21 OSNet2009
description:
In conjunction with the EOS21-TM map projection (code 9738) applied to EOS21-IRF (code 9739), emulates the EOS21 Snake projection. Applied to ETRS89 (as realized through the OSNet v2009 CORS) defines EOS21-IRF hence is errorless.


auth_name: EPSG
name: ETRS89 to ECML14_NB-IRF (1)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: TN15-ETRS89-to-ECML14_NB-IRF.gsb
operation_version: NR-Gbr ECML_NB OSNet2009
description:
In conjunction with the ECML14_NB-TM map projection (code 9760) applied to ECML14_NB-IRF (code 9758), emulates the ECML14_NB Snake projection. Applied to ETRS89 (as realized through the OSNet v2009 CORS) defines ECML14_NB-IRF hence is errorless.


auth_name: EPSG
name: ETRS89 to EWR2-IRF (1)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: TN15-ETRS89-to-EWR2-IRF.gsb
operation_version: NR-Gbr EWR2 OSNet2009
description:
In conjunction with the EWR2-TM map projection (code 9765) applied to EWR2-IRF (code 9763), emulates the EWR2 Snake projection. Applied to ETRS89 (as realized through the OSNet v2009 CORS) defines EWR2-IRF hence is errorless.


auth_name: EPSG
name: RGF93 v2b to NGF-IGN69 height (4)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (IGN2009)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: RAF18b.mnt
operation_version: IGN Fra 18b
description:
Replaces RAF18 geoid model [RGF93 v2 to NGF-IGN69 height (3)]. Accuracy at each grid node is in the geoid model file. Recommended interpolation method is bilinear. For reversible alternative see RGF93 v2b to RGF93 v2b + NGF-IGN69 height (4) (code 9787).


auth_name: EPSG
name: RGF93 v2b to RGF93 v2b + NGF-IGN69 height (4)
method_auth_name: EPSG
method_name: Geog3D to Geog2D+GravityRelatedHeight (IGN2009)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: RAF18b.mnt
interpolation_crs_auth_name: EPSG
operation_version: IGN Fra 18b
description:
Reversible alternative to RGF93 v2b to NGF-IGN69 height (4) (CT code 9786). Replaces RGF93 v2 to RGF93 v2 + NGF-IGN69 height (3) (CT code 9638).


auth_name: EPSG
name: ETRS89 to MRH21-IRF (1)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: TN15-ETRS89-to-MRH21-IRF.gsb
operation_version: NR-Gbr MHR21 OSNet2009
description:
In conjunction with MRH21-TM map projection (code 9868) applied to MRH21-IRF (code 9866), emulates the MRH21 Snake projection. Applied to ETRS89 (as realized through the OSNet v2009) defines MRH21-IRF hence is errorless.						


auth_name: EPSG
name: RGF93 v2b to NGF-IGN69 height (5)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (IGN2009)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: RAF20.tac
operation_version: IGN Fra 20
description:
Replaces RAF18b geoid model [RGF93 v2 to NGF-IGN69 height (4)]. Accuracy at each grid node is in the geoid model file. Recommended interpolation method is bilinear. For reversible alternative see RGF93 v2b to RGF93 v2b + NGF-IGN69 height (5) (code 9877).


auth_name: EPSG
name: RGF93 v2b to RGF93 v2b + NGF-IGN69 height (5)
method_auth_name: EPSG
method_name: Geog3D to Geog2D+GravityRelatedHeight (IGN2009)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: RAF20.tac
interpolation_crs_auth_name: EPSG
operation_version: IGN Fra 20
description:
Reversible alternative to RGF93 v2b to NGF-IGN69 height (5) (CT code 9876). Replaces RGF93 v2b to RGF93 v2b + NGF-IGN69 height (4) (CT code 9787).


auth_name: EPSG
name: ETRS89 to MOLDOR11-IRF (1)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: TN15-ETRS89-to-MOLDOR11-IRF.gsb
operation_version: NR-Gbr MOLDOR OSNet2009
description:
In conjunction with the MOLDOR11-TM map projection (code 9879) applied to MOLDOR11-IRF (code 9871), emulates the MOLDOR11 Snake projection. Applied to ETRS89 (as realized through the OSNet v2009 CORS) defines MOLDOR11-IRF hence is errorless.


auth_name: EPSG
name: ETRS89 to CD Norway depth (1)
method_auth_name: EPSG
method_name: Geographic3D to Depth (Gravsoft)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: ChartDatum_above_Ellipsoid_EUREF89_v2021a.bin
operation_version: SK-Nor 2021
description:
For reversible alternative to this transformation see ETRS89 to ETRS89 + CD Norway depth (1) (code 9885). An improved model is expected in 2023.


auth_name: EPSG
name: ETRS89 to ETRS89 + CD Norway depth (1)
method_auth_name: EPSG
method_name: Geog3D to Geog2D+Depth (Gravsoft)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: ChartDatum_above_Ellipsoid_EUREF89_v2021a.bin
interpolation_crs_auth_name: EPSG
operation_version: SK-Nor 2021
description:
Reversible alternative to ETRS89 to CD Norway depth (1) (code 9884). An improved model is expected in 2023.


auth_name: EPSG
name: NTF to RGF93 v2 (1)
method_auth_name: EPSG
method_name: Geocentric translation by Grid Interpolation (IGN)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geocentric translation file
grid_name: gr3df97a.txt
interpolation_crs_auth_name: EPSG
operation_version: IGN-Fra 1m
description:
Parameter file is from NTF to RGF93 v1 (code 9327), assuming that RGF93 v1 is equivalent to RGF93 v2 within the accuracy of the transformation. May be emulated using NTv2 method - see CT code 9890.


auth_name: EPSG
name: NTF to RGF93 v2b (1)
method_auth_name: EPSG
method_name: Geocentric translation by Grid Interpolation (IGN)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geocentric translation file
grid_name: gr3df97a.txt
interpolation_crs_auth_name: EPSG
operation_version: IGN-Fra 1m
description:
Parameter file is from NTF to RGF93 v1 (code 9327), assuming that RGF93 v1 is equivalent to RGF93 v2b within the accuracy of the transformation. May be emulated using NTv2 method - see CT code 9891.


auth_name: EPSG
name: RGF93 v2 to NTF (2)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: rgf93_ntf.gsb
operation_version: ESRI-Fra 1m emulation
description:
Emulation of transformation NTF to RGF93 v2 (1), code 9888. Note that grid file parameters are of opposite sign. Parameter file is from RGF93 v1 to NTF (code 15958), assuming that RGF93 v1 is equivalent to RGF93 v2 within the accuracy of the CT.


auth_name: EPSG
name: RGF93 v2b to NTF (2)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: rgf93_ntf.gsb
operation_version: ESRI-Fra 1m emulation
description:
Emulation of transformation NTF to RGF93 v2b (1), code 9889. Note that grid file parameters are of opposite sign. Parameter file is from RGF93 v1 to NTF (code 15958), assuming that RGF93 v1 is equivalent to RGF93 v2b within the accuracy of the CT.


auth_name: EPSG
name: JGD2000 to WGS 84 (2)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: touhokutaiheiyouoki2011.gsb
operation_version: IOGP-Jpn N Honshu
description:
Parameter file from JGD2000 to JGD2011 (1) (code 6713) assuming that JGD2011 is equivalent to WGS 84 within the accuracy of this CT. Use for area affected by the 2011 Tohoku earthquake; for areas outside this extent use JGD2000 to WGS 84 (1) (code 1826).


auth_name: EPSG
name: Genoa 1942 height to EVRF2019 height (1)
method_auth_name: EPSG
method_name: Vertical Offset by Grid Interpolation (asc)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Vertical offset file
grid_name: it_2019z.asc
interpolation_crs_auth_name: EPSG
operation_version: EuG-Ita 2019z 2020-09
description:
Determined at 26 points, SD 0.062m. Offset: mean -0.285m, minimum -0.441m, maximum -0.194m. The extent corresponds to the area in Italy containing benchmarks with EVRF heights.


auth_name: EPSG
name: ETRS89 to Ostend height (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (txt)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: hBG18.dat
operation_version: NGI-Bel 2018
description:
Based on gravimetric quasi-geoid NLGEO2018 fitted to 3707 benchmarks of the Ostend height leveling network. SD of 1 cm. In use from 2018-08-01. For reversible alternative to this transformation see ETRS89 to ETRS89 + Ostend height (1) (code 9909).


auth_name: EPSG
name: MGI to ETRS89 (8)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: AT_GIS_GRID_2021_09_28.gsb
operation_version: BEV-Aut NTv2 2021
description:
Replaces GIS-Grid (2010) (CT 5891). Not to be used for cadastral purposes because it does not comply with the rules for control network tie-in as per Paragraph 3 of the Land Survey Regulations (Vermessungsverordnung) 2010.


auth_name: EPSG
name: ETRS89 to BI height (2)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (OSGM15-Ire)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: OSGM15_Belfast.gri
operation_version: OS-UK NI 2015
description:
Parameter file taken from ETRS89 to Belfast height (2). Belfast is a member of the BI ensemble. For reversible alternative to this transformation see ETRS89 to ETRS89 + BI height (2) (code 9917).


auth_name: EPSG
name: ETRS89 to BI height (3)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (OSGM15-Ire)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: OSGM15_Malin.gri
operation_version: OS-Ire 2015
description:
Parameter file taken from ETRS89 to Malin Head height (2). Malin Head is a member of the BI ensemble. For reversible alternative to this transformation see ETRS89 to ETRS89 + BI height (3) (code 9919).


auth_name: EPSG
name: Genoa 1942 height to EVRF2019 mean-tide height (1)
method_auth_name: EPSG
method_name: Vertical Offset by Grid Interpolation (asc)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Vertical offset file
grid_name: it_2019m.asc
interpolation_crs_auth_name: EPSG
operation_version: EuG-Ita 2019m 2020-09
description:
Determined at 26 points, SD 0.054m. Offset: mean -0.328m, minimum -0.469m, maximum -0.249m. The extent corresponds to the area in Italy containing benchmarks with EVRF heights.


auth_name: EPSG
name: ETRS89 to DHHN2016 height (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (txt)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: GCG2016.txt
operation_version: BKG-Deu 2016
description:
Accuracy approx. 1 cm in the lowlands, approx. 2 cm in the high mountains and 2 - 6 cm offshore. For reversible alternative to this transformation see ETRS89 to ETRS89 + DHHN2016 height (1) (code 9926).


auth_name: EPSG
name: ETRS89 to ETRS89 + DHHN2016 height (1)
method_auth_name: EPSG
method_name: Geog3D to Geog2D+GravityRelatedHeight (txt)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: GCG2016.txt
interpolation_crs_auth_name: EPSG
operation_version: BKG-Deu 2016
description:
Reversible alternative to ETRS89 to DHHN2016 height (1) (code 9925). Accuracy approx. 1 cm in the lowlands, approx. 2 cm in the high mountains and 2 - 6 cm offshore.


auth_name: EPSG
name: ETRS89 to EBBWV14-IRF (1)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: TN15-ETRS89-to-EBBWV14-IRF.gsb
operation_version: NR-Gbr EBBWV14 OSNet2009
description:
In conjunction with EBBWV14-TM map projection (code 9942) applied to EBBWV14-IRF (code 9939), emulates the EBBWV14 Snake projection. Applied to ETRS89 (as realized through the OSNet v2009) defines EBBWV14-IRF hence is errorless.						


auth_name: EPSG
name: ISN93 to ISH2004 height (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (Gravsoft)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: Icegeoid_ISN93.gri
operation_version: NMI-Isl
description:
File is also available in NOAA VDatum format (Icegeoid_ISN93.gtx). For reversible alternative to this transformation see ISN93 to ISN93 + ISH2004 height (1) (CT code 9955). Replaced by Icegeoid_ISN2004 (CT code 9956).


auth_name: EPSG
name: ISN93 to ISN93 + ISH2004 height (1)
method_auth_name: EPSG
method_name: Geog3D to Geog2D+GravityRelatedHeight (Gravsoft)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: Icegeoid_ISN93.gri
interpolation_crs_auth_name: EPSG
operation_version: NMI-Isl
description:
Reversible alternative to ISN93 to ISH2004 height (1) (code 9954). File is also available in NOAA VDatum format (Icegeoid_ISN93.gtx). Replaced by Icegeoid_ISN2004.


auth_name: EPSG
name: ISN2004 to ISH2004 height (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (Gravsoft)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: Icegeoid_ISN2004.gri
operation_version: NMI-Isl
description:
File also available in NOAA VDatum format (Icegeoid_ISN2004.gtx). For reversible alternative to this transformation see ISN2004 to ISN2004 + ISH2004 height (1) (CT code 9957). Replaces Icegeoid_ISN93 (code 9954). Replaced by Icegeoid_ISN2016 (code 9958).


auth_name: EPSG
name: ISN2004 to ISN2004 + ISH2004 height (1)
method_auth_name: EPSG
method_name: Geog3D to Geog2D+GravityRelatedHeight (Gravsoft)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: Icegeoid_ISN2004.gri
interpolation_crs_auth_name: EPSG
operation_version: NMI-Isl
description:
Reversible alternative to ISN2004 to ISH2004 height (1) (CT code 9956). File is also available in NOAA VDatum format (Icegeoid_ISN2004.gtx). Replaces Icegeoid_ISN93, replaced by Icegeoid_ISN2016.


auth_name: EPSG
name: ISN2016 to ISH2004 height (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (Gravsoft)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: Icegeoid_ISN2016.gri
operation_version: NMI-Isl
description:
File also available in NOAA VDatum format (Icegeoid_ISN2016.gtx). For reversible alternative to this transformation see ISN2016 to ISN2016 + ISH2004 height (1) (CT code 9959). Replaces Icegeoid_ISN2004 (code 9956).


auth_name: EPSG
name: ISN2016 to ISN2016 + ISH2004 height (1)
method_auth_name: EPSG
method_name: Geog3D to Geog2D+GravityRelatedHeight (Gravsoft)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: Icegeoid_ISN2016.gri
interpolation_crs_auth_name: EPSG
operation_version: NMI-Isl
description:
Reversible alternative to ISN2016 to ISH2004 height (1) (CT code 9958). File is also available in NOAA VDatum format (Icegeoid_ISN2016.gtx). Replaces Icegeoid_ISN2004.


auth_name: EPSG
name: ETRS89 to HULLEE13-IRF (1)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: TN15-ETRS89-to-HULLEE13-IRF.gsb
operation_version: NR-Gbr HULLEE OSNet2009
description:
In conjunction with the HULLEE13-TM map projection (code 9966) applied to HULLEE13-IRF (code 9964), emulates the HULLEE13 Snake projection. Applied to ETRS89 (as realized through the OSNet v2009) defines HULLEE13-IRF hence is errorless.						


auth_name: EPSG
name: ETRS89 to SCM22-IRF (1)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: TN15-ETRS89-to-SCM22-IRF.gsb
operation_version: NR-Gbr SCM22 OSNet2009
description:
In conjunction with the SCM22-TM map projection (code 9971) applied to SCM22-IRF (code 9969), emulates the SCM22 Snake projection. Applied to ETRS89 (as realized through the OSNet v2009) defines SCM22-IRF hence is errorless.


auth_name: EPSG
name: ETRS89 to FNL22-IRF (1)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: TN15-ETRS89-to-FNL22-IRF.gsb
operation_version: NR-Gbr FNL22 OSNet2009
description:
In conjunction with the FNL22-TM map projection (code 9976) applied to FNL22-IRF (code 9974), emulates the FNL22 Snake projection. Applied to ETRS89 (as realized through the OSNet v2009) defines FNL22-IRF hence is errorless.						


auth_name: EPSG
name: SIRGAS 2000 to SIRGAS-CON SIR17P01 (1)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: SIRGAS2000-to-SIRGAS-CONSIR17P01.gsb
operation_version: SIR-SAm 2021
description:
Derived at 79 stations at epoch 2015.00. Accuracy deteriorates with time due to intra-plate seismic deformation.


auth_name: EPSG
name: NAD83(CSRS)v3 to CGVD28 height (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (NRCan byn)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: HT2_1997.byn
operation_version: NRC-Can CGG2000
description:
Valid at epoch 1997.0. Hybrid geoid derived from CGG2000 gravimetric geoid fitted to 1926 benchmarks with CGVD28 and NAD83(CSRS)v3 heights. On publication in 2019 of models valid at other epochs, file renamed from "HT2_0.byn"; no change to file contents.


auth_name: EPSG
name: NAD83(CSRS)v2 to CGVD28 height (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (NRCan byn)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: HT2_1997.byn
operation_version: NRC-Can CGG2000 1997
description:
Valid at epoch 1997.0. Hybrid geoid model. A provisional grid was derived through NAD83(CSRS98) (= NAD83(CSRS)v2) and used HT1 software. This grid is an update derived through NAD83(CSRS)v3, see CT code 9983. It is used in HT2 software.


auth_name: EPSG
name: NAD83(CSRS)v4 to CGVD28 height (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (NRCan byn)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: HT2_2002v70.byn
operation_version: NRC-Can CGG2000 2002
description:
Valid at epoch 2002.0. Hybrid geoid model, grid derived at epoch 1997.0 through NAD83(CSRS)v3 (CT code 9983) and then modified to include correction for propagation of height between 1997.0 and 2002.0 derived from the Canada velocity grid v7.0.


auth_name: EPSG
name: NAD83(CSRS)v6 to CGVD28 height (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (NRCan byn)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: HT2_2010v70.byn
operation_version: NRC-Can CGG2000 2010
description:
Valid at epoch 2010.0. Hybrid geoid model, grid derived at epoch 1997.0 through NAD83(CSRS)v3 (CT code 9983) and then modified to include correction for propagation of height between 1997.0 and 2010.0 derived from the Canada velocity grid v7.0.


auth_name: EPSG
name: RGF93 v1 to NGF-IGN69 height (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (IGN1997)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: ggf97a.txt
operation_version: IGN Fra
description:
May be used for transformations from WGS 84 to NGF-IGN69 height. Accuracy at each 0.1 deg x 0.1 degree grid node is given within the geoid model file.


auth_name: EPSG
name: ETRS89 to NGF-IGN69 height (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (IGN1997)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: ggf97a.txt
operation_version: IGN Fra
description:
Parameter values taken from RGF93 v1 to NGF-IGN69 height (1) (code 10000) assuming that RGF93 v1 is equivalent to ETRS89 within the accuracy of the transformation. Accuracy at each 0.1 deg x 0.1 degree grid node is given within the geoid model file.


auth_name: EPSG
name: RGF93 v1 to NGF-IGN78 height (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (IGN1997)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: ggf97a_corse.txt
operation_version: IGN Fra Cor
description:
May be used for transformations from WGS 84 to NGF-IGN78 height. Accuracy at each 0.1 deg x 0.1 degree grid node is given within the geoid model file.


auth_name: EPSG
name: ETRS89 to NGF-IGN78 height (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (IGN1997)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: ggf97a_corse.txt
operation_version: IGN Fra Cor
description:
Parameter values taken from RGF93 v1 to NGF-IGN78 height (1) (code 10002) assuming that RGF93 v1 is equivalent to ETRS89 within the accuracy of the transformation. Accuracy at each 0.1 deg x 0.1 degree grid node is given within the geoid model file.


auth_name: EPSG
name: RGFG95 to NGG1977 height (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (IGN1997)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: ggguy00.txt
operation_version: IGN Guf
description:
May be used for transformations from WGS 84 to NGG1977. Accuracy at each 0.025 deg x 0.025 degree grid node is given within the geoid model file. For reversible alternative to this transformation see RGFG95 to RGFG95 + NGG1977 height (1) (code 9630).


auth_name: EPSG
name: RGR92 to Reunion 1989 height (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (IGN1997)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: ggr99.txt
operation_version: IGN Reu
description:
May be used for transformations from WGS 84 to IGN 1989. Accuracy at each 0.02 deg x 0.02 degree grid node is given within the geoid model file.


auth_name: EPSG
name: NAD83 to NAVD88 height (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (gtx)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: g2003u01.bin
operation_version: NGS-US Conus NW
description:
Uses Geoid03 hybrid model. See information source for further information. Note: Source CRS is 2D, used in this application of the method as a pseudo-3D CRS.


auth_name: EPSG
name: WGS 84 to EGM96 height (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (EGM)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: WW15MGH.GRD
operation_version: NGA-World
description:
Replaces WGS 84 to EGM84 height (1) (CT 15781). Replaced by WGS 84 to EGM2008 height (1) and (2) (CTs 3858-59). For reversible alternative see WGS 84 to WGS 84 + EGM96 height (1) (CT 9708). An executable using spherical harmonics is also available.


auth_name: EPSG
name: ETRS89 to MWC18-IRF (1)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: TN15-ETRS89-to-MWC18-IRF.gsb
operation_version: NR-Gbr MWC18 OSNet2009
description:
In conjunction with the MWC18-TM map projection (code 10127) applied to MWC18-IRF (code 20033), emulates the MWC18 Snake projection. Applied to ETRS89 (as realized through the OSNet v2009) defines MWC18-IRF hence is errorless.						


auth_name: EPSG
name: NAD83(CSRS)v4 to CGVD2013a(2002) height (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (NRCan byn)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: CGG2013an83.byn
operation_version: NR-Can CGG2013a 2002
description:
Defines CGVD2013a(2002) height. For reversible alternative see NAD83(CSRS)v4 to NAD83(CSRS)v4 + CGVD2013a(2002) height (1) (code 10128).


auth_name: EPSG
name: NAD83(CSRS)v3 to CGVD2013a(1997) height (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (NRCan byn)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: CGG2013an83.byn
operation_version: NR-Can CGG2013a 1997
description:
Defines CGVD2013a(1997) height. For reversible alternative see NAD83(CSRS)v3 to NAD83(CSRS)v3 + CGVD2013a(1997) height (1) (code 10129).


auth_name: EPSG
name: CGVD28 height to CGVD2013a(1997) height (1)
method_auth_name: EPSG
method_name: Vertical Offset by Grid Interpolation (NRCan byn)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Vertical offset file
grid_name: HT2_1997_CGG2013a.byn
interpolation_crs_auth_name: EPSG
operation_version: NR-Can HT2 1997
description:
Equivalent to HT2_1997 hybrid geoid model minus CGG2013a geoid model (i.e. CT code 9983 minus CT 10111 = CT 9984 minus CT 10112). Specifies NAD83(CSRS)v3 as interpolation CRS, but NAD83(CSRS)v2 (code 8237) may equally be used.


auth_name: EPSG
name: CGVD28 height to CGVD2013a(2002) height (1)
method_auth_name: EPSG
method_name: Vertical Offset by Grid Interpolation (NRCan byn)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Vertical offset file
grid_name: HT2_2002v70_CGG2013a.byn
interpolation_crs_auth_name: EPSG
operation_version: NR-Can HT2 2002
description:
Equivalent to HT2_2002v70 hybrid geoid model minus CGG2013a geoid model (i.e. CT code 9985 minus CT 10110).


auth_name: EPSG
name: CGVD28 height to CGVD2013a(2010) height (1)
method_auth_name: EPSG
method_name: Vertical Offset by Grid Interpolation (NRCan byn)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Vertical offset file
grid_name: HT2_2010v70_CGG2013a.byn
interpolation_crs_auth_name: EPSG
operation_version: NR-Can HT2 2010
description:
Equivalent to HT2_2010v70 hybrid geoid model minus CGG2013a geoid model (i.e. CT code 9986 minus CT 9247 = CT 9987 minus CT 10109). Specifies NAD83(CSRS)v6 as interpolation CRS, but NAD83(CSRS)v7 (code 8255) may equally be used.


auth_name: EPSG
name: ETRS89 to CD Norway depth (2)
method_auth_name: EPSG
method_name: Geographic3D to Depth (Gravsoft)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: ChartDatum_above_Ellipsoid_EUREF89_v2021b.bin
operation_version: SK-Nor 2021b
description:
Replaces ETRS89 to CD Norway depth (1) (code 9884). For reversible alternative to this transformation see ETRS89 to ETRS89 + CD Norway depth (2) (code 10133).


auth_name: EPSG
name: ETRS89 to ETRS89 + CD Norway depth (2)
method_auth_name: EPSG
method_name: Geog3D to Geog2D+Depth (Gravsoft)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: ChartDatum_above_Ellipsoid_EUREF89_v2021b.bin
interpolation_crs_auth_name: EPSG
operation_version: SK-Nor 2021b
description:
Reversible alternative to ETRS89 to CD Norway depth (2) (code 10130). Replaces ETRS89 to ETRS89 + CD Norway depth (2) (code 9885).


auth_name: EPSG
name: SRGI2013 to INAGeoid2020 v2 height (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (gtx)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: INAGEOID2020v2.gtx
operation_version: BIG-Idn INAGeoid20 v2
description:
Defines INAGeoid2020 v2 reference surface and as such is considered to be errorless. Internal accuracy is between 0.05 and 0.3m on the large islands of Indonesia. Replaces INAGeoid2020 v1 (CT code 9305).


auth_name: EPSG
name: ETRS89 to ETRS89 + MSL UK & Ireland VORF08 depth (1)
method_auth_name: EPSG
method_name: Geog3D to Geog2D+Depth (txt)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: VORF-UK08_ETRF_to_MSL.vrf
interpolation_crs_auth_name: EPSG
operation_version: UKHO-VORF08
description:
Reversible alternative to ETRS89 to MSL UK & Ireland VORF08 depth (1) (code 10154). VORF08 usually delivered in tiles covering 2° by 2° or less. Transformation accuracy at 2-sigma is 0.20 metres (inshore) and 0.30 metres (offshore).


auth_name: EPSG
name: ETRS89 to ETRS89 + CD UK & Ireland VORF08 depth (1)
method_auth_name: EPSG
method_name: Geog3D to Geog2D+Depth (txt)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: VORF-UK08_ETRF_to_CD.vrf
interpolation_crs_auth_name: EPSG
operation_version: UKHO-VORF08
description:
Reversible alternative to ETRS89 to CD UK & Ireland VORF08 depth (1) (code 10155). VORF08 usually delivered in tiles covering 2° by 2° or less. Transformation accuracy at 2-sigma is 0.20 metres (inshore) and 0.30 metres (offshore).


auth_name: EPSG
name: ETRS89 to MSL UK & Ireland VORF08 depth (1)
method_auth_name: EPSG
method_name: Geographic3D to Depth (txt)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: VORF-UK08_ETRF_to_MSL.vrf
operation_version: UKHO-VORF08
description:
For reversible alternative to this transformation see ETRS89 to ETRS89 + MSL UK & Ireland VORF08 depth (1) (code 10152).


auth_name: EPSG
name: ETRS89 to CD UK & Ireland VORF08 depth (1)
method_auth_name: EPSG
method_name: Geographic3D to Depth (txt)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: VORF-UK08_ETRF_to_CD.vrf
operation_version: UKHO-VORF08
description:
For reversible alternative to this transformation see ETRS89 to ETRS89 + CD UK & Ireland VORF08 depth (1) (code 10153).


auth_name: EPSG
name: ETRS89 to DoPw22-IRF (1)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: TN15-ETRS89-to-DoPw22-IRF.gsb
operation_version: NR-Gbr DoPw22 OSNet2009
description:
In conjunction with DoPw22-TM map projection (code 10182) applied to DoPw22-IRF (code 10175), emulates the DoPw22 Snake projection. Applied to ETRS89 (as realized through the OSNet v2009) defines DoPw22-IRF hence is errorless.


auth_name: EPSG
name: ETRS89 to ShAb07-IRF (1)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: TN15-ETRS89-to-ShAb07-IRF.gsb
operation_version: NR-Gbr ShAb07 OSNet2009
description:
In conjunction with the ShAb07-TM map projection (code 10187) applied to ShAb07-IRF (code 10185), emulates the ShAb07 Snake projection. Applied to ETRS89 (as realized through the OSNet v2009) defines ShAb07-IRF hence is errorless.


auth_name: EPSG
name: ETRS89 to CNH22-IRF (1)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: TN15-ETRS89-to-CNH22-IRF.gsb
operation_version: NR-Gbr CNH22 OSNet2009
description:
In conjunction with the CNH22-LCC map projection (code 10193) applied to CNH22-IRF (code 10191), emulates the CNH22 Snake projection. Applied to ETRS89 (as realized through the OSNet v2009 CORS) defines CNH22-IRF hence is errorless.


auth_name: EPSG
name: ETRS89 to CWS13-IRF (1)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: TN15-ETRS89-to-CWS13-IRF.gsb
operation_version: NR-Gbr CWS13 OSNet2009
description:
In conjunction with the CWS13-TM map projection (code 10198) applied to CWS13-IRF (code 10196), emulates the CWS13 Snake projection. Applied to ETRS89 (as realized through the OSNet v2009 CORS) defines CWS13-IRF hence is errorless.


auth_name: EPSG
name: ETRS89 to DIBA15-IRF (1)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: TN15-ETRS89-to-DIBA15-IRF.gsb
operation_version: NR-Gbr DIBA15 OSNet2009
description:
In conjunction with the DIBA15-TM map projection (code 10206) applied to DIBA15-IRF (code 10204), emulates the DIBA15 Snake projection. Applied to ETRS89 (as realized through the OSNet v2009 CORS) defines DIBA15-IRF hence is errorless.


auth_name: EPSG
name: ETRS89 to GWPBS22-IRF (1)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: TN15-ETRS89-to-GWPBS22-IRF.gsb
operation_version: NR-Gbr GWPBS22 OSNet2009
description:
In conjunction with the GW22-LCC map projection (code 10211) applied to GWPBS22-IRF (code 10209), emulates the GWPBS22 Snake projection. Applied to ETRS89 (as realized through the OSNet v2009) defines GWPBS22-IRF hence is errorless.						


auth_name: EPSG
name: ETRS89 to GWWAB22-IRF (1)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: TN15-ETRS89-to-GWWAB22-IRF.gsb
operation_version: NR-Gbr GWWAB22 OSNet2009
description:
In conjunction with the GW22-LCC map projection (code 10211) applied to GWWAB22-IRF (code 10214), emulates the GWWAB22 Snake projection. Applied to ETRS89 (as realized through the OSNet v2009) defines GWWAB22-IRF hence is errorless.						


auth_name: EPSG
name: ETRS89 to GWWWA22-IRF (1)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: TN15-ETRS89-to-GWWWA22-IRF.gsb
operation_version: NR-Gbr GWWWA22 OSNet2009
description:
In conjunction with the GW22-LCC map projection (code 10211) applied to GWWWA22-IRF (code 10219), emulates the GWWWA22 Snake projection. Applied to ETRS89 (as realized through the OSNet v2009) defines GWWWA22-IRF hence is errorless.						


auth_name: EPSG
name: ETRS89 to MALS09-IRF (1)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: TN15-ETRS89-to-MALS09-IRF.gsb
operation_version: NR-Gbr MALS09 OSNet2009
description:
In conjunction with MALS09-TM map projection (code 10226) applied to MALS09-IRF (code 10224), emulates the MALS09 Snake projection. Applied to ETRS89 (as realized through the OSNet v2009) defines MALS09-IRF hence is errorless.						


auth_name: EPSG
name: ETRS89 to OxWo08-IRF (1)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: TN15-ETRS89-to-OxWo08-IRF.gsb
operation_version: NR-Gbr OxWo08 OSNet2009
description:
In conjunction with the OxWo08-TM map projection (code 10234) applied to OxWo08-IRF (code 10229), emulates the OxWo08 Snake projection. Applied to ETRS89 (as realized through the OSNet v2009) defines OxWo08-IRF hence is errorless.


auth_name: EPSG
name: ETRS89 to SYC20-IRF (1)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: TN15-ETRS89-to-SYC20-IRF.gsb
operation_version: NR-Gbr SYC20 OSNet2009
description:
In conjunction with the SYC20-TM map projection (code 10239) applied to SYC20-IRF (code 10237), emulates the SYC20 Snake projection. Applied to ETRS89 (as realized through the OSNet v2009) defines SYC20-IRF hence is errorless.						


auth_name: EPSG
name: Slovenia 1996 to SVS2010 height (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (ISG)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
operation_version: SMA-Svn VRP2016/Koper
description:
Hybrid geoid fitted to 66 levelling benchmarks. File also available in Gravsoft format (SLOVRP2016-Koper.gri). For reversible alternative to this transformation see Slovenia 1996 to Slovenia 1996 + SVS2010 height (1) (CT code 10248).

grid_name:
https://isgeoid.polimi.it/Geoid/Europe/Slovenia/public/Slovenia_2016_SLO_VRP2016_Koper_hybrQ_20221122.isg


auth_name: EPSG
name: Slovenia 1996 to Slovenia 1996 + SVS2010 height (1)
method_auth_name: EPSG
method_name: Geog3D to Geog2D+GravityRelatedHeight (ISG)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
interpolation_crs_auth_name: EPSG
operation_version: SMA-Svn VRP2016/Koper
description:
Reversible alternative to Slovenia 1996 to SVS2010 height (1) (CT code 10247). Hybrid geoid fitted at 66 levelling benchmarks. File is also available in Gravsoft format (SLOVRP2016-Koper.gri).

grid_name:
https://isgeoid.polimi.it/Geoid/Europe/Slovenia/public/Slovenia_2016_SLO_VRP2016_Koper_hybrQ_20221122.isg


auth_name: EPSG
name: ETRS89 to SMITB20-IRF (1)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: TN15-ETRS89-to-SMITB20-IRF.gsb
operation_version: NR-Gbr SMITB20 OSNet2009
description:
In conjunction with the SMITB20-TM map projection (code 10274) applied to SMITB20-IRF (code 10272), emulates the SMITB20 Snake projection. Applied to ETRS89 (as realized through the OSNet v2009) defines SMITB20-IRF hence is errorless.


auth_name: EPSG
name: ETRS89 to RBEPP12-IRF (1)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: TN15-ETRS89-to-RBEPP12-IRF.gsb
operation_version: NR-Gbr RBEPP12 OSNet2009
description:
In conjunction with the RBEPP12-LCC map projection (code 10279) applied to RBEPP12-IRF (code 10277), emulates the RBEPP12 Snake projection. Applied to ETRS89 (as realized through the OSNet v2009) defines RBEPP12-IRF hence is errorless.


auth_name: EPSG
name: CH1903 to CH1903+ (1)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: CHENyx06a.gsb
operation_version: BfL-Che
description:
For improved accuracy (0.01m) use CHENyx06 interpolation programme FINELTRA. File CHENyx06 replaced by CHENyx06a; there is a small area at the border of the data where some more real data has been introduced. swisstopo consider the change insignificant.


auth_name: EPSG
name: RRAF 1991 to IGN 1992 LD height (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (IGN1997)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: ggg00_ld.txt
operation_version: IGN Glp Des
description:
May be used for transformations from WGS 84 to IGN 1992 LD. Accuracy at each 0.025 deg x 0.025 degree grid node is given within the geoid model file.


auth_name: EPSG
name: WGS 84 to EGM84 height (1)
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (EGM)
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: DIRACC.DAT
operation_version: NGA-World
description:
File may also be found named as "EGM84.GRD". An executable using spherical harmonics is also available. Replaced by WGS 84 to EGM96 height (1) (CT code 10084).


auth_name: EPSG
name: AGD84 to WGS 84 (9)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: National 84 (02.07.01).gsb
operation_version: OGP-Aus 1m
description:
Parameter values from AGD84 to GDA94 (5) (code 1804). Approximation assuming WGS 84 is equivalent to GDA94; ignores the low accuracy of the WGS 84 ensemble and the inconsistent application of tectonic plate motion to WGS 84 data.


auth_name: EPSG
name: AGD66 to WGS 84 (17)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: A66 National (13.09.01).gsb
operation_version: OGP-Aus 0.1m
description:
Parameter values from AGD66 to GDA94 (11) (code 1803). Approximation assuming WGS 84 is equivalent to GDA94; ignores the low accuracy of the WGS 84 ensemble and the inconsistent application of tectonic plate motion to WGS 84 data.


auth_name: EPSG
name: NAD83 to NAD83(HARN) (44)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: nchpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: nchpgn.los
operation_version: NGS-Usa NC
description:
Uses NADCON method which expects longitudes positive west; EPSG GeogCRSs NAD83 (code 4269) and NAD83(HARN) (code 4152) have longitudes positive east. May be taken as approximate transformation NAD83-WGS 84 - see code 15835.


auth_name: EPSG
name: NAD83 to WGS 84 (55)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: nchpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: nchpgn.los
operation_version: OGP-Usa NC
description:
Parameter files are from NAD83 to NAD83(HARN) (44) (code 15834) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.


auth_name: EPSG
name: NAD83 to NAD83(HARN) (45)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: schpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: schpgn.los
operation_version: NGS-Usa SC
description:
Uses NADCON method which expects longitudes positive west; EPSG GeogCRSs NAD83 (code 4269) and NAD83(HARN) (code 4152) have longitudes positive east. May be taken as approximate transformation NAD83-WGS 84 - see code 15837.


auth_name: EPSG
name: NAD83 to WGS 84 (56)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: schpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: schpgn.los
operation_version: OGP-Usa SC
description:
Parameter files are from NAD83 to NAD83(HARN) (45) (code 15836) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.


auth_name: EPSG
name: NAD83 to NAD83(HARN) (46)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: pahpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: pahpgn.los
operation_version: NGS-Usa PA
description:
Uses NADCON method which expects longitudes positive west; EPSG GeogCRSs NAD83 (code 4269) and NAD83(HARN) (code 4152) have longitudes positive east. May be taken as approximate transformation NAD83-WGS 84 - see code 15839.


auth_name: EPSG
name: NAD83 to WGS 84 (57)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: pahpgn.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: pahpgn.los
operation_version: OGP-Usa PA
description:
Parameter files are from NAD83 to NAD83(HARN) (46) (code 15838) assuming that NAD83(HARN) is equivalent to WGS 84 within the accuracy of the transformation.


auth_name: EPSG
name: Old Hawaiian to WGS 84 (8)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: hawaii.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: hawaii.los
operation_version: OGP-Usa HI 2m
description:
Parameter files are from Old Hawaiian to NAD83 (1) (code 1454) assuming that NAD83 is equivalent to WGS 84 within the accuracy of the transformation.


auth_name: EPSG
name: Puerto Rico to WGS 84 (4)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: prvi.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: prvi.los
operation_version: OGP-Pri 2m
description:
Parameter files are from Puerto Rico to NAD83 (1) (code 1461) assuming that NAD83 is equivalent to WGS 84 within the accuracy of the transformation.


auth_name: EPSG
name: NAD27 to WGS 84 (79)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: conus.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: conus.los
operation_version: OGP-Usa Conus
description:
Parameter files are from NAD27 to NAD83 (1) (code 1241) assuming that NAD83 is equivalent to WGS 84 within the accuracy of this tfm. Uses NADCON method which expects longitudes positive west; EPSG CRS codes 4267 and 4326 have longitudes positive east.


auth_name: EPSG
name: NAD27 to WGS 84 (85)
method_auth_name: EPSG
method_name: NADCON
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude difference file
grid_name: alaska.las
grid2_param_auth_name: EPSG
grid2_param_name: Longitude difference file
grid2_name: alaska.los
operation_version: OGP-Usa AK
description:
Parameter files are from NAD27 to NAD83 (2) (code 1243) assuming that NAD83 is equivalent to WGS 84 within the accuracy of this tfm. Uses NADCON method which expects longitudes positive west; EPSG CRS codes 4267 and 4326 have longitudes positive east.


auth_name: EPSG
name: ED50 to ETRS89 (11)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: sped2et.gsb
operation_version: IGN-Esp
description:
May be taken as approximate transformation ED50 to WGS 84 - see code 15907. NOTE: Parameter file is non-conformant with NTv2 specification - replaced by ED50 to ETRS89 (12) (code 15932).


auth_name: EPSG
name: ED50 to WGS 84 (40)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: sped2et.gsb
operation_version: OGP-Esp
description:
Parameter values from ED50 to ETRS89 (11) (code 15895). Assumes ETRS89 and WGS 84 can be considered the same to within the accuracy of the transformation. NOTE: Parameter file is non-conformant with NTv2 specification - replaced by ED50 to WGS 84 (41).


auth_name: EPSG
name: ED50 to ETRS89 (12)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: SPED2ETV2.gsb
operation_version: IGN-Esp v2
description:
Replaces ED50 to ETRS89 (11) (code 15895) - see supersession record. May be taken as approximate transformation ED50 to WGS 84 - see code 15933.


auth_name: EPSG
name: ED50 to WGS 84 (41)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: SPED2ETV2.gsb
operation_version: OGP-Esp v2
description:
Parameter values from ED50 to ETRS89 (12) (code 15932). Assumes ETRS89 and WGS 84 can be considered the same to within the accuracy of the transformation. Replaces ED50 to WGS 84 (40) - see supersession record.


auth_name: EPSG
name: NTF to RGF93 (2)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: rgf93_ntf.gsb
operation_version: ESRI-Fra 1m emulation
description:
Emulation using NTv2 method of France Geocentric Interpolation method tfm NTF to RGF93 (1), code 1053. May be taken as approximate transformation to ETRS89 or WGS 84 - see tfm codes 15941 and 15942.


auth_name: EPSG
name: NTF to ETRS89 (3)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: rgf93_ntf.gsb
operation_version: EPSG-Fra 1m emulation
description:
These parameter values are taken from NTF to RGR93 (2) (code 15940) as RGR93 may be considered equivalent to ETRS89 within the accuracy of the transformation. Emulation of France Geocentric Interpolation method tfm code 1054.


auth_name: EPSG
name: NTF to WGS 84 (3)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: rgf93_ntf.gsb
operation_version: EPSG-Fra 1m emulation
description:
These parameter values are taken from NTF to RGR93 (2) (code 15940) as RGR93 may be considered equivalent to WGS 84 within the accuracy of the transformation. Emulation of France Geocentric Interpolation method tfm code 15939.


auth_name: EPSG
name: DHDN to ETRS89 (8)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: BETA2007.gsb
operation_version: BKG-Deu BeTA2007
description:
Developed for ATKIS (Amtliches Topographisch-Kartographisches Informationssystem [Official Topographic and Cartographic Information System]). Provides a uniform transformation across the whole country. May be used as tfm to WGS84 - see tfm code 15949.


auth_name: EPSG
name: DHDN to WGS 84 (4)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: BETA2007.gsb
operation_version: OGP-Deu BeTA2007
description:
These parameter values are taken from DHDN to ETRS89 (8) (code 15948) as ETRS89 may be considered equivalent to WGS 84 within the accuracy of the transformation.


auth_name: EPSG
name: RD/83 to WGS 84 (1)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: BETA2007.gsb
operation_version: OGP-Deu BeTA2007
description:
Parameter values from taken DHDN to ETRS89 (8) (code 15948) as RD/83 and ETRS89 may be considered equivalent to DHDN and WGS 84 respectively within the accuracy of the transformation.


auth_name: EPSG
name: PD/83 to WGS 84 (1)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: BETA2007.gsb
operation_version: OGP-Deu BeTA2007
description:
Parameter values taken from DHDN to ETRS89 (8) (code 15948) as PD/83 and ETRS89 may be considered equivalent to DHDN and WGS 84 respectively within the accuracy of the transformation.


auth_name: EPSG
name: RGF93 v1 to NTF (2)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: rgf93_ntf.gsb
operation_version: ESRI-Fra 1m emulation
description:
Emulation using NTv2 method of NTF to RGF93 v1 (1), code 9327. Note that grid file parameters are of opposite sign. May be taken as approximate CT to ETRS89 or WGS 84 (see codes 15959 and 15960). Also used to transform later realizations of RGF93 to NTF.


auth_name: EPSG
name: ETRS89 to NTF (3)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: rgf93_ntf.gsb
operation_version: EPSG-Fra 1m emulation
description:
These parameter values are taken from RGF93 to NTF (2) (code 15958) as RGF93 may be considered equivalent to ETRS89 within the accuracy of the transformation.


auth_name: EPSG
name: WGS 84 to NTF (3)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: rgf93_ntf.gsb
operation_version: EPSG-Fra 1m emulation
description:
These parameter values are taken from RGF93 to NTF (2) (code 15958) as RGF93 may be considered equivalent to WGS 84 within the accuracy of the transformation.


auth_name: EPSG
name: RGNC91-93 to IGN72 Grande Terre (6)
method_auth_name: EPSG
method_name: NTv2
source_crs_auth_name: EPSG
target_crs_auth_name: EPSG
grid_param_auth_name: EPSG
grid_param_name: Latitude and longitude difference file
grid_name: RGNC1991_IGN72GrandeTerre.gsb
operation_version: ESRI-Ncl 0.1m
description:
Emulation using NTv2 method of tfm IGN72 Grande Terre to RGNC91-93 (4) (code 9329). Note reversal sign of of parameter values in grid file.


auth_name: IGNF
code: TSG1156
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (IGN1997)
source_crs_auth_name: IGNF
source_crs_code: RGSPM06GEO
target_crs_auth_name: IGNF
target_crs_code: STPM50_V
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: http://geodesie.ign.fr/contenu/fichiers/documentation/grilles/outremer/ggspm06v1.mnt
operation_version: 1.0.0
name:
RGSPM06 (RESEAU GEODESIQUE DE SAINT-PIERRE-ET-MIQUELON 2006) vers DANGER 1950 (SAINT-PIERRE-ET-MIQUELON)


auth_name: IGNF
code: TSG1178
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (IGN1997)
source_crs_auth_name: IGNF
source_crs_code: RGAF09GEODD
target_crs_auth_name: IGNF
target_crs_code: GUAD88MG
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: http://geodesie.ign.fr/contenu/fichiers/documentation/grilles/outremer/RAMG2016.mnt
operation_version: 1.0.0
name:
RGAF09 (RESEAU GEODESIQUE DES ANTILLES FRANCAISES 2009) vers IGN 1988 MG (GUADELOUPE / MARIE-GALANTE)


auth_name: IGNF
code: TSG1181
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (IGN1997)
source_crs_auth_name: IGNF
source_crs_code: RGAF09GEODD
target_crs_auth_name: IGNF
target_crs_code: GUAD88SB
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: http://geodesie.ign.fr/contenu/fichiers/documentation/grilles/outremer/gg10_sbv2.mnt
operation_version: 1.0.0
name:
RGAF09 (RESEAU GEODESIQUE DES ANTILLES FRANCAISES 2009) vers IGN 1988 SB (GUADELOUPE / SAINT-BARTHELEMY)


auth_name: IGNF
code: TSG1182
method_auth_name: EPSG
method_name: Geographic3D to GravityRelatedHeight (IGN1997)
source_crs_auth_name: IGNF
source_crs_code: RGAF09GEODD
target_crs_auth_name: IGNF
target_crs_code: GUAD88SM
grid_param_auth_name: EPSG
grid_param_name: Geoid (height correction) model file
grid_name: http://geodesie.ign.fr/contenu/fichiers/documentation/grilles/outremer/gg10_smv2.mnt
operation_version: 1.0.0
name:
RGAF09 (RESEAU GEODESIQUE DES ANTILLES FRANCAISES 2009) vers IGN 1988 SM (GUADELOUPE / SAINT-MARTIN)


