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Fix existing and add more transformation test + test for is_geographic (ref 3a302667a1)

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This commit is contained in:
Artem Pavlenko 2021-03-24 11:23:27 +00:00
parent f82ed08d6a
commit 2bb5bdb9fe
1 changed files with 57 additions and 56 deletions
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113
test/unit/projection/proj_transform.cpp
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@ -3,12 +3,7 @@
#include <mapnik/projection.hpp>
#include <mapnik/proj_transform.hpp>
#include <mapnik/geometry/box2d.hpp>
#ifdef MAPNIK_USE_PROJ4
// proj4
#include <proj_api.h>
#endif
#include <tuple>
TEST_CASE("projection transform")
{
@ -17,6 +12,10 @@ SECTION("Test bounding box transforms - 4326 to 3857")
{
mapnik::projection proj_4326("epsg:4326");
mapnik::projection proj_3857("epsg:3857");
CHECK(proj_4326.is_geographic());
CHECK(!proj_3857.is_geographic());
mapnik::proj_transform prj_trans(proj_4326, proj_3857);
double minx = -45.0;
@ -45,36 +44,15 @@ SECTION("Test bounding box transforms - 4326 to 3857")
}
#if defined(MAPNIK_USE_PROJ4) && PJ_VERSION >= 480
SECTION("test pj_transform failure behavior")
#if defined(MAPNIK_USE_PROJ)
SECTION("test proj_transform failure behavior")
{
mapnik::projection proj_4269("epsg:4269");
mapnik::projection proj_3857("epsg:3857");
mapnik::proj_transform prj_trans(proj_4269, proj_3857);
mapnik::proj_transform prj_trans2(proj_3857, proj_4269);
auto proj_ctx0 = pj_ctx_alloc();
REQUIRE( proj_ctx0 != nullptr );
auto proj0 = pj_init_plus_ctx(proj_ctx0, proj_4269.params().c_str());
REQUIRE( proj0 != nullptr );
auto proj_ctx1 = pj_ctx_alloc();
REQUIRE( proj_ctx1 != nullptr );
auto proj1 = pj_init_plus_ctx(proj_ctx1, proj_3857.params().c_str());
REQUIRE( proj1 != nullptr );
// first test valid values directly against proj
double x = -180.0;
double y = -60.0;
x *= DEG_TO_RAD;
y *= DEG_TO_RAD;
CHECK( x == Approx(-3.1415926536) );
CHECK( y == Approx(-1.0471975512) );
CHECK( 0 == pj_transform(proj0, proj1, 1, 0, &x, &y, nullptr) );
CHECK( x == Approx(-20037508.3427892439) );
CHECK( y == Approx(-8399737.8896366451) );
// now test mapnik class
// test valid coordinate
double x0 = -180.0;
double y0 = -60.0;
CHECK( prj_trans.forward(&x0,&y0,nullptr,1,1) );
@ -86,38 +64,61 @@ SECTION("test pj_transform failure behavior")
CHECK( x1 == Approx(-20037508.3427892439) );
CHECK( y1 == Approx(-8399737.8896366451) );
// longitude value outside the value range for mercator
x = -181.0;
y = -91.0;
x *= DEG_TO_RAD;
y *= DEG_TO_RAD;
CHECK( x == Approx(-3.1590459461) );
CHECK( y == Approx(-1.5882496193) );
CHECK( 0 == pj_transform(proj0, proj1, 1, 0, &x, &y, nullptr) );
CHECK( std::isinf(x) );
CHECK( std::isinf(y) );
// now test mapnik class
// now test invalid coordinate
double x2 = -181.0;
double y2 = -91.0;
CHECK( false == prj_trans.forward(&x2,&y2,nullptr,1,1) );
prj_trans.forward(&x2,&y2,nullptr,1,1);
CHECK( std::isinf(x2) );
CHECK( std::isinf(y2) );
double x3 = -181.0;
double y3 = -91.0;
CHECK( false == prj_trans2.backward(&x3,&y3,nullptr,1,1) );
prj_trans2.backward(&x3,&y3,nullptr,1,1);
CHECK( std::isinf(x3) );
CHECK( std::isinf(y3) );
}
// cleanup
pj_ctx_free(proj_ctx0);
proj_ctx0 = nullptr;
pj_free(proj0);
proj0 = nullptr;
pj_ctx_free(proj_ctx1);
proj_ctx1 = nullptr;
pj_free(proj1);
proj1 = nullptr;
SECTION("test forward/backward transformations")
{
//WGS 84 - World Geodetic System 1984, used in GPS
mapnik::projection proj_4236("epsg:4236");
//OSGB 1936 / British National Grid -- United Kingdom Ordnance Survey
mapnik::projection proj_27700("epsg:27700");
//WGS 84 / Equal Earth Greenwich
mapnik::projection proj_8857("epsg:8857");
//European Terrestrial Reference System 1989 (ETRS89)
mapnik::projection proj_4937("epsg:4937");
//"Webmercator" WGS 84 / Pseudo-Mercator -- Spherical Mercator, Google Maps, OpenStreetMap, Bing, ArcGIS, ESRI
mapnik::projection proj_3857("epsg:3857");
mapnik::proj_transform tr1(proj_4236, proj_27700);
mapnik::proj_transform tr2(proj_4236, proj_8857);
mapnik::proj_transform tr3(proj_4236, proj_4236);
mapnik::proj_transform tr4(proj_4236, proj_4937);
mapnik::proj_transform tr5(proj_4236, proj_3857);
std::initializer_list<std::reference_wrapper<mapnik::proj_transform>> transforms = {
tr1, tr2, tr3, tr4, tr5
};
std::initializer_list<std::tuple<double, double>> coords = {
{-4.0278869, 57.8796955}, // City of Dornoch
{-4.2488787, 55.8609825}, // City of Glasgow
{-1.4823897, 51.8726941}, // Charlbury
};
for (auto const& c : coords)
{
double x0, y0;
std::tie(x0, y0) = c;
for (mapnik::proj_transform const& tr : transforms)
{
double x1 = x0;
double y1 = y0;
tr.forward (&x1, &y1, nullptr, 1, 1);
tr.backward(&x1, &y1, nullptr, 1, 1);
CHECK (x0 == Approx(x1));
CHECK (y0 == Approx(y1));
}
}
}
// Github Issue https://github.com/mapnik/mapnik/issues/2648
@ -242,11 +243,11 @@ SECTION("proj_transform of coordinate arrays with stride > 1")
}
}
#ifdef MAPNIK_USE_PROJ4
#ifdef MAPNIK_USE_PROJ
SECTION("lonlat <-> New Zealand Transverse Mercator 2000")
{
mapnik::projection const proj_2193("+init=epsg:2193");
mapnik::projection const proj_2193("epsg:2193");
// cs2cs -Ef %.10f epsg:4326 +to epsg:2193 <<END
// 170.142139 -43.595056
// 175.566667 -39.283333
@ -274,7 +275,7 @@ SECTION("proj_transform of coordinate arrays with stride > 1")
CHECK(points[1].y == Approx(-39.283333));
}
}
#endif // MAPNIK_USE_PROJ4
#endif // MAPNIK_USE_PROJ
}
}