136 lines
3.3 KiB
C++
136 lines
3.3 KiB
C++
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#include <crs.h>
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#include <webmercator.h>
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#pragma execution_character_set("utf-8")
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namespace LAMPMainWidget
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{
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PointXY
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WebMercator::forward(const LAMPMainWidget::PointXY& point) const
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{
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PointXY result{};
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PointXY originXy = CRS::forward(point);
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QSizeF sz = extent().size();
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result.setX(sz.width() / 2 + originXy.x());
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result.setY(sz.height() / 2 - originXy.y());
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return result;
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}
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PointXY
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WebMercator::inverse(const LAMPMainWidget::PointXY& point) const
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{
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PointXY originXy{};
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QSizeF sz = extent().size();
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originXy.setX(point.x() - sz.width() / 2);
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originXy.setY(sz.height() / 2 - point.y());
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return CRS::inverse(originXy);
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}
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QString
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WebMercator::proj4Cvt() const
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{
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return QString{"+proj=webmerc +datum=WGS84"};
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}
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QString
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WebMercator::wktDef() const
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{
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return QString{
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R"(
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PROJCS["WGS 84 / Pseudo-Mercator",
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GEOGCS["WGS 84",
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DATUM["WGS_1984",
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SPHEROID["WGS 84",6378137,298.257223563,
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AUTHORITY["EPSG","7030"]],
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AUTHORITY["EPSG","6326"]],
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PRIMEM["Greenwich",0,
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AUTHORITY["EPSG","8901"]],
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UNIT["degree",0.0174532925199433,
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AUTHORITY["EPSG","9122"]],
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AUTHORITY["EPSG","4326"]],
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PROJECTION["Mercator_1SP"],
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PARAMETER["central_meridian",0],
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PARAMETER["scale_factor",1],
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PARAMETER["false_easting",0],
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PARAMETER["false_northing",0],
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UNIT["metre",1,
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AUTHORITY["EPSG","9001"]],
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AXIS["X",EAST],
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AXIS["Y",NORTH],
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EXTENSION["PROJ4",
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"+proj=merc
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+a=6378137
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+b=6378137
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+lat_ts=0.0
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+lon_0=0.0
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+x_0=0.0
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+y_0=0
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+k=1.0
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+units=m
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+nadgrids=@null
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+wktext
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+no_defs"],
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AUTHORITY["EPSG","3857"]
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])"
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};
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}
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QRectF
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WebMercator::extent() const
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{
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return QRectF{0, 0, 40075016.686, 40075016.686};
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}
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QString
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WebMercator::proj4Def() const
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{
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/* return QString{
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R"(
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+proj=merc
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+a=6378137
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+b=6378137
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+lat_ts=0.0
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+lon_0=0.0
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+x_0=0.0
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+y_0=0
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+k=1.0
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+units=m
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+nadgrids=@null
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+wktext
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+no_defs)"
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};
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*/
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return QString{
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R"(
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PROJCS["unnamed",
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GEOGCS["WGS 84",
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DATUM["WGS_1984",
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SPHEROID["WGS 84",6378137,298.257223563,
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AUTHORITY["EPSG","7030"]],
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AUTHORITY["EPSG","6326"]],
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PRIMEM["Greenwich",0,
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AUTHORITY["EPSG","8901"]],
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UNIT["degree",0.0174532925199433,
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AUTHORITY["EPSG","9122"]],
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AUTHORITY["EPSG","4326"]],
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PROJECTION["Mercator_1SP"],
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PARAMETER["central_meridian",0],
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PARAMETER["scale_factor",1],
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PARAMETER["false_easting",0],
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PARAMETER["false_northing",0],
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UNIT["metre",1,
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AUTHORITY["EPSG","9001"]],
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AXIS["Easting",EAST],
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AXIS["Northing",NORTH]]
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)"
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};
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}
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}
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