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Fix BBOX in geographic WGS84 (epsg:4326) calc logic

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This commit is contained in:
Artem Pavlenko 2021-03-09 15:02:11 +00:00
parent 977c65e9de
commit eb49b5776a
1 changed files with 7 additions and 3 deletions
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10
demo/viewer/mapwidget.cpp
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@ -23,7 +23,7 @@
#include <boost/bind.hpp> #include <boost/bind.hpp>
#include <mapnik/agg_renderer.hpp> #include <mapnik/agg_renderer.hpp>
#include <mapnik/layer.hpp> #include <mapnik/layer.hpp>
#include <mapnik/projection.hpp> #include <mapnik/proj_transform.hpp>
#include <mapnik/scale_denominator.hpp> #include <mapnik/scale_denominator.hpp>
#include <mapnik/view_transform.hpp> #include <mapnik/view_transform.hpp>
#include <mapnik/transform_path_adapter.hpp> #include <mapnik/transform_path_adapter.hpp>
@ -592,8 +592,12 @@ void MapWidget::updateMap()
double y0 = ext.miny(); double y0 = ext.miny();
double x1 = ext.maxx(); double x1 = ext.maxx();
double y1 = ext.maxy(); double y1 = ext.maxy();
prj.inverse(x0,y0); double z = 0;
prj.inverse(x1,y1); std::string dest_srs = {"epsg:4326"};
mapnik::proj_transform proj_tr(map_->srs(), dest_srs);
proj_tr.forward(x0, y0, z);
proj_tr.forward(x1, y1, z);
std::cout << "BBOX (WGS84): " << x0 << "," << y0 << "," << x1 << "," << y1 << "\n"; std::cout << "BBOX (WGS84): " << x0 << "," << y0 << "," << x1 << "," << y1 << "\n";
update(); update();
// emit signal to interested widgets // emit signal to interested widgets