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Backport Python test of bbox reprojection

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Originaly in Python from https://github.com/mapnik/mapnik/pull/2657
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Jiri Drbalek 2017-09-04 08:42:55 +00:00 committed by Mickey Rose
parent abbe44db6d
commit 9a30fda852
1 changed files with 66 additions and 0 deletions
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66
test/unit/projection/proj_transform.cpp
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@ -119,4 +119,70 @@ SECTION("test pj_transform failure behavior")
#endif
// Github Issue https://github.com/mapnik/mapnik/issues/2648
SECTION("Test proj antimeridian bbox")
{
mapnik::projection prj_geog("+init=epsg:4326");
mapnik::projection prj_proj("+init=epsg:2193");
mapnik::proj_transform prj_trans_fwd(prj_proj, prj_geog);
mapnik::proj_transform prj_trans_rev(prj_geog, prj_proj);
// bad = mapnik.Box2d(-177.31453250437079, -62.33374815225163, 178.02778363316355, -24.584597490955804)
const mapnik::box2d<double> better(-180.0, -62.33374815225163,
180.0, -24.584597490955804);
{
mapnik::box2d<double> ext(274000, 3087000, 3327000, 7173000);
prj_trans_fwd.forward(ext, PROJ_ENVELOPE_POINTS);
CHECK(ext.minx() == Approx(better.minx()));
CHECK(ext.miny() == Approx(better.miny()));
CHECK(ext.maxx() == Approx(better.maxx()));
CHECK(ext.maxy() == Approx(better.maxy()));
}
{
// check the same logic works for .backward()
mapnik::box2d<double> ext(274000, 3087000, 3327000, 7173000);
prj_trans_rev.backward(ext, PROJ_ENVELOPE_POINTS);
CHECK(ext.minx() == Approx(better.minx()));
CHECK(ext.miny() == Approx(better.miny()));
CHECK(ext.maxx() == Approx(better.maxx()));
CHECK(ext.maxy() == Approx(better.maxy()));
}
{
// checks for not being snapped (ie. not antimeridian)
mapnik::box2d<double> ext(274000, 3087000, 3327000, 7173000);
prj_trans_rev.backward(ext, PROJ_ENVELOPE_POINTS);
CHECK(ext.minx() == Approx(better.minx()));
CHECK(ext.miny() == Approx(better.miny()));
CHECK(ext.maxx() == Approx(better.maxx()));
CHECK(ext.maxy() == Approx(better.maxy()));
}
const mapnik::box2d<double> normal(148.766759749, -60.1222810238,
159.95484893, -24.9774643167);
{
// checks for not being snapped (ie. not antimeridian)
mapnik::box2d<double> ext(274000, 3087000, 276000, 7173000);
prj_trans_fwd.forward(ext, PROJ_ENVELOPE_POINTS);
CHECK(ext.minx() == Approx(normal.minx()));
CHECK(ext.miny() == Approx(normal.miny()));
CHECK(ext.maxx() == Approx(normal.maxx()));
CHECK(ext.maxy() == Approx(normal.maxy()));
}
{
// check the same logic works for .backward()
mapnik::box2d<double> ext(274000, 3087000, 276000, 7173000);
prj_trans_rev.backward(ext, PROJ_ENVELOPE_POINTS);
CHECK(ext.minx() == Approx(normal.minx()));
CHECK(ext.miny() == Approx(normal.miny()));
CHECK(ext.maxx() == Approx(normal.maxx()));
CHECK(ext.maxy() == Approx(normal.maxy()));
}
}
}