8511256779
git-subtree-dir: third_party/libosmium git-subtree-split: 2282c8450bae55839372a2002db7ca754530d2fc
38 lines
1.6 KiB
C++
38 lines
1.6 KiB
C++
#include "catch.hpp"
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#include <osmium/geom/mercator_projection.hpp>
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TEST_CASE("Mercator") {
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SECTION("mercator_projection") {
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osmium::geom::MercatorProjection projection;
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REQUIRE(3857 == projection.epsg());
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REQUIRE("+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0 +k=1.0 +units=m +nadgrids=@null +wktext +no_defs" == projection.proj_string());
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}
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SECTION("low_level_mercator_functions") {
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osmium::geom::Coordinates c1(17.839, -3.249);
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osmium::geom::Coordinates r1 = osmium::geom::mercator_to_lonlat(osmium::geom::lonlat_to_mercator(c1));
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REQUIRE(r1.x == Approx(c1.x).epsilon(0.000001));
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REQUIRE(r1.y == Approx(c1.y).epsilon(0.000001));
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osmium::geom::Coordinates c2(-89.2, 15.915);
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osmium::geom::Coordinates r2 = osmium::geom::mercator_to_lonlat(osmium::geom::lonlat_to_mercator(c2));
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REQUIRE(r2.x == Approx(c2.x).epsilon(0.000001));
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REQUIRE(r2.y == Approx(c2.y).epsilon(0.000001));
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osmium::geom::Coordinates c3(180.0, 85.0);
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osmium::geom::Coordinates r3 = osmium::geom::mercator_to_lonlat(osmium::geom::lonlat_to_mercator(c3));
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REQUIRE(r3.x == Approx(c3.x).epsilon(0.000001));
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REQUIRE(r3.y == Approx(c3.y).epsilon(0.000001));
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}
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SECTION("mercator_bounds") {
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osmium::Location mmax(180.0, osmium::geom::MERCATOR_MAX_LAT);
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osmium::geom::Coordinates c = osmium::geom::lonlat_to_mercator(mmax);
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REQUIRE(c.x == Approx(c.y).epsilon(0.001));
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REQUIRE(osmium::geom::detail::y_to_lat(osmium::geom::detail::lon_to_x(180.0)) == Approx(osmium::geom::MERCATOR_MAX_LAT).epsilon(0.0000001));
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}
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}
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