Remove support for projection using the Proj library

This has been deprecated a while because it only works with very old
versions of the Proj library.

CMakeLists.txt

@@ -401,7 +401,7 @@ if(BUILD_HEADERS)
     file(MAKE_DIRECTORY header_check)
 
     foreach(hpp ${ALL_HPPS})
-        if((GDAL_FOUND AND PROJ_FOUND) OR NOT ((hpp STREQUAL "osmium/area/problem_reporter_ogr.hpp") OR (hpp STREQUAL "osmium/geom/ogr.hpp") OR (hpp STREQUAL "osmium/geom/projection.hpp")))
+        if((GDAL_FOUND) OR NOT ((hpp STREQUAL "osmium/area/problem_reporter_ogr.hpp") OR (hpp STREQUAL "osmium/geom/ogr.hpp")))
             string(REPLACE ".hpp" "" tmp ${hpp})
             string(REPLACE "/" "__" libname ${tmp})
 

test/CMakeLists.txt

@@ -105,10 +105,6 @@ if(NOT GEOS_FOUND)
     set(GEOS_FOUND FALSE)
 endif()
 
-if(NOT PROJ_FOUND)
-    set(PROJ_FOUND FALSE)
-endif()
-
 if(NOT SPARSEHASH_FOUND)
     set(SPARSEHASH_FOUND FALSE)
 endif()
@@ -157,15 +153,14 @@ add_unit_test(builder test_attr)
 add_unit_test(builder test_object_builder)
 
 add_unit_test(geom test_coordinates)
-add_unit_test(geom test_crs ENABLE_IF ${PROJ_FOUND} LIBS ${PROJ_LIBRARY})
 add_unit_test(geom test_exception)
-add_unit_test(geom test_factory_with_projection ENABLE_IF ${PROJ_FOUND} LIBS ${PROJ_LIBRARY})
+add_unit_test(geom test_factory_with_projection)
 add_unit_test(geom test_geojson)
 add_unit_test(geom test_geos ENABLE_IF ${GEOS_FOUND} LIBS ${GEOS_LIBRARY})
 add_unit_test(geom test_mercator)
 add_unit_test(geom test_ogr ENABLE_IF ${GDAL_FOUND} LIBS ${GDAL_LIBRARY})
 add_unit_test(geom test_ogr_wkb ENABLE_IF ${GDAL_FOUND} LIBS ${GDAL_LIBRARY})
-add_unit_test(geom test_projection ENABLE_IF ${PROJ_FOUND} LIBS ${PROJ_LIBRARY})
+add_unit_test(geom test_projection)
 add_unit_test(geom test_tile)
 add_unit_test(geom test_wkb)
 add_unit_test(geom test_wkt)

test/t/geom/test_factory_with_projection.cpp

@@ -1,7 +1,6 @@
 #include "catch.hpp"
 
 #include <osmium/geom/mercator_projection.hpp>
-#include <osmium/geom/projection.hpp>
 #include <osmium/geom/wkt.hpp>
 
 #include <string>
@@ -13,10 +12,3 @@ TEST_CASE("Projection using MercatorProjection class to WKT") {
     REQUIRE(wkt == "POINT(356222.37 467961.14)");
 }
 
-TEST_CASE("Projection using Projection class to WKT") {
-    osmium::geom::WKTFactory<osmium::geom::Projection> factory{osmium::geom::Projection{3857}, 2};
-
-    const std::string wkt{factory.create_point(osmium::Location{3.2, 4.2})};
-    REQUIRE(wkt == "POINT(356222.37 467961.14)");
-}
-

test/t/geom/test_projection.cpp

@@ -2,78 +2,13 @@
 
 #include <osmium/geom/factory.hpp>
 #include <osmium/geom/mercator_projection.hpp>
-#include <osmium/geom/projection.hpp>
 
 TEST_CASE("Indentity Projection") {
     const osmium::geom::IdentityProjection projection;
     REQUIRE(4326 == projection.epsg());
     REQUIRE("+proj=longlat +datum=WGS84 +no_defs" == projection.proj_string());
 }
 
-TEST_CASE("Projection 4326") {
-    const osmium::geom::Projection projection{4326};
-    REQUIRE(4326 == projection.epsg());
-    REQUIRE("+init=epsg:4326" == projection.proj_string());
-
-    const osmium::Location loc{1.0, 2.0};
-    const osmium::geom::Coordinates c{1.0, 2.0};
-    REQUIRE(projection(loc).x == Approx(c.x).epsilon(0.00001));
-    REQUIRE(projection(loc).y == Approx(c.y).epsilon(0.00001));
-}
-
-TEST_CASE("Projection 4326 from init string") {
-    const osmium::geom::Projection projection{"+init=epsg:4326"};
-    REQUIRE(-1 == projection.epsg());
-    REQUIRE("+init=epsg:4326" == projection.proj_string());
-
-    const osmium::Location loc{1.0, 2.0};
-    const osmium::geom::Coordinates c{1.0, 2.0};
-    REQUIRE(projection(loc).x == Approx(c.x).epsilon(0.00001));
-    REQUIRE(projection(loc).y == Approx(c.y).epsilon(0.00001));
-}
-
-TEST_CASE("Creating projection from unknown init string") {
-    REQUIRE_THROWS_AS(osmium::geom::Projection{"abc"}, osmium::projection_error);
-}
-
-TEST_CASE("Creating projection from unknown EPSG code") {
-    REQUIRE_THROWS_AS(osmium::geom::Projection{9999999}, osmium::projection_error);
-}
-
-TEST_CASE("Projection 3857") {
-    const osmium::geom::Projection projection{3857};
-    REQUIRE(3857 == projection.epsg());
-    REQUIRE("+init=epsg:3857" == projection.proj_string());
-
-    SECTION("Zero coordinates") {
-        const osmium::Location loc{0.0, 0.0};
-        const osmium::geom::Coordinates c{0.0, 0.0};
-        REQUIRE(projection(loc).x == Approx(c.x).epsilon(0.00001));
-        REQUIRE(projection(loc).y == Approx(c.y).epsilon(0.00001));
-    }
-
-    SECTION("Max longitude") {
-        const osmium::Location loc{180.0, 0.0};
-        const osmium::geom::Coordinates c{20037508.34, 0.0};
-        REQUIRE(projection(loc).x == Approx(c.x).epsilon(0.00001));
-        REQUIRE(projection(loc).y == Approx(c.y).epsilon(0.00001));
-    }
-
-    SECTION("Min longitude") {
-        const osmium::Location loc{-180.0, 0.0};
-        const osmium::geom::Coordinates c{-20037508.34, 0.0};
-        REQUIRE(projection(loc).x == Approx(c.x).epsilon(0.00001));
-        REQUIRE(projection(loc).y == Approx(c.y).epsilon(0.00001));
-    }
-
-    SECTION("Max latitude") {
-        const osmium::Location loc{0.0, 85.0511288};
-        const osmium::geom::Coordinates c{0.0, 20037508.34};
-        REQUIRE(projection(loc).x == Approx(c.x).epsilon(0.00001));
-        REQUIRE(projection(loc).y == Approx(c.y).epsilon(0.00001));
-    }
-}
-
 TEST_CASE("MercatorProjection: Zero coordinates") {
     const osmium::geom::MercatorProjection projection;
     const osmium::Location loc{0.0, 0.0};