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Add basic forward/backward test for reprojection bounding box for epsg:3995 (WGS 84 / Arctic Polar Stereographic)

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This commit is contained in:
Artem Pavlenko 2024-07-29 11:23:39 +01:00
parent 7358a66c2f
commit 4f6a7a2571
1 changed files with 40 additions and 2 deletions
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42
test/unit/projection/proj_transform.cpp
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@ -16,6 +16,8 @@ TEST_CASE("projection transform")
CHECK(proj_4326.is_geographic()); CHECK(proj_4326.is_geographic());
CHECK(!proj_3857.is_geographic()); CHECK(!proj_3857.is_geographic());
CHECK(*proj_4326.area_of_use() == mapnik::box2d<double>(-180, -90, 180, 90));
CHECK(*proj_3857.area_of_use() == mapnik::box2d<double>(-180, -85.06, 180, 85.06));
mapnik::proj_transform prj_trans(proj_4326, proj_3857); mapnik::proj_transform prj_trans(proj_4326, proj_3857);
double minx = -45.0; double minx = -45.0;
@ -48,6 +50,7 @@ TEST_CASE("projection transform")
{ {
mapnik::projection proj_4269("epsg:4269"); mapnik::projection proj_4269("epsg:4269");
mapnik::projection proj_3857("epsg:3857"); mapnik::projection proj_3857("epsg:3857");
mapnik::proj_transform prj_trans(proj_4269, proj_3857); mapnik::proj_transform prj_trans(proj_4269, proj_3857);
mapnik::proj_transform prj_trans2(proj_3857, proj_4269); mapnik::proj_transform prj_trans2(proj_3857, proj_4269);
@ -200,7 +203,43 @@ TEST_CASE("projection transform")
} }
} }
} }
#endif SECTION("Test proj north/south poles bbox")
{
// WGS 84 / Arctic Polar Stereographic
mapnik::projection prj_geog("epsg:4326");
mapnik::projection prj_proj("epsg:3995");
mapnik::proj_transform prj_trans_fwd(prj_proj, prj_geog);
mapnik::proj_transform prj_trans_rev(prj_geog, prj_proj);
// bounds
const mapnik::box2d<double> bounds{-180.0,60.0,180.0,90.0};
{
// projected bounds
mapnik::box2d<double> projected_bounds{-3299207.53,-3333134.03, 3299207.53, 3333134.03};
CHECKED_IF(prj_trans_fwd.forward(projected_bounds, PROJ_ENVELOPE_POINTS))
{
CHECK(projected_bounds.minx() == Approx(bounds.minx()));
CHECK(projected_bounds.miny() == Approx(48.65640)); // this is expected
CHECK(projected_bounds.maxx() == Approx(bounds.maxx()));
CHECK(projected_bounds.maxy() == Approx(bounds.maxy()));
}
}
{
// check the same logic works for .backward()
mapnik::box2d<double> projected_bounds{-3299207.53,-3333134.03, 3299207.53, 3333134.03};
CHECKED_IF(prj_trans_rev.backward(projected_bounds, PROJ_ENVELOPE_POINTS))
{
CHECK(projected_bounds.minx() == Approx(bounds.minx()));
CHECK(projected_bounds.miny() == Approx(48.65640)); // this is expected
CHECK(projected_bounds.maxx() == Approx(bounds.maxx()));
CHECK(projected_bounds.maxy() == Approx(bounds.maxy()));
}
}
}
SECTION("proj_transform of coordinate arrays with stride > 1") SECTION("proj_transform of coordinate arrays with stride > 1")
{ {
@ -237,7 +276,6 @@ TEST_CASE("projection transform")
} }
} }
#ifdef MAPNIK_USE_PROJ
SECTION("lonlat <-> New Zealand Transverse Mercator 2000") SECTION("lonlat <-> New Zealand Transverse Mercator 2000")
{ {
mapnik::projection const proj_2193("epsg:2193"); mapnik::projection const proj_2193("epsg:2193");