Add proj_get_geoid_models_from_database() (#2681)

to list all geoid model names that apply to a vertical CRS

2 files changed, 76 insertions, 0 deletions

diff --git a/test/unit/test_c_api.cpp b/test/unit/test_c_api.cpp
index 8fa1b228..dfc92139 100644
--- a/test/unit/test_c_api.cpp
+++ b/test/unit/test_c_api.cpp
@@ -5619,5 +5619,25 @@ TEST_F(CApi, proj_get_insert_statements) {
         proj_insert_object_session_destroy(m_ctxt, session);
     }
 }
+// ---------------------------------------------------------------------------
+
+TEST_F(CApi, proj_get_geoid_models_from_database) {
+    auto findInList = [](PROJ_STRING_LIST list, const std::string &ref) {
+        while (list && *list) {
+            if (std::string(*list) == ref) {
+                return true;
+            }
+            list++;
+        }
+        return false;
+    };
+
+    auto list =
+        proj_get_geoid_models_from_database(m_ctxt, "EPSG", "5703", nullptr);
+    ListFreer freer(list);
+    EXPECT_TRUE(findInList(list, "GEOID12B"));
+    EXPECT_TRUE(findInList(list, "GEOID18"));
+    EXPECT_FALSE(findInList(list, "OSGM15"));
+}
 
 } // namespace
diff --git a/test/unit/test_factory.cpp b/test/unit/test_factory.cpp
index c10c4697..37013775 100644
--- a/test/unit/test_factory.cpp
+++ b/test/unit/test_factory.cpp
@@ -2139,6 +2139,62 @@ TEST(
     }
 }
 
+TEST(factory, AuthorityFactory_getAvailableGeoidmodels) {
+
+    const std::string OSGM15{"OSGM15"};
+    const std::string GEOID12B{"GEOID12B"};
+    const std::string GEOID18{"GEOID18"};
+
+    auto checkNavd88 = [&](const std::list<std::string> &res) {
+        EXPECT_TRUE(res.end() != std::find(res.begin(), res.end(), GEOID12B));
+        EXPECT_TRUE(res.end() != std::find(res.begin(), res.end(), GEOID18));
+        EXPECT_FALSE(res.end() != std::find(res.begin(), res.end(), OSGM15));
+    };
+
+    auto checkOdn = [&](const std::list<std::string> &res) {
+        EXPECT_FALSE(res.end() != std::find(res.begin(), res.end(), GEOID12B));
+        EXPECT_FALSE(res.end() != std::find(res.begin(), res.end(), GEOID18));
+        EXPECT_TRUE(res.end() != std::find(res.begin(), res.end(), OSGM15));
+    };
+
+    auto factory = AuthorityFactory::create(DatabaseContext::create(), "EPSG");
+
+    {
+        auto res = factory->getGeoidModels("4326");
+        ASSERT_TRUE(res.empty());
+    }
+
+    {
+        auto res = factory->getGeoidModels("5703"); // "NAVD88 height"
+        checkNavd88(res);
+    }
+    {
+        auto res = factory->getGeoidModels("6360"); // "NAVD88 height (ftUS)"
+        checkNavd88(res);
+    }
+    {
+        auto res = factory->getGeoidModels("8228"); // "NAVD88 height (ft)"
+        checkNavd88(res);
+    }
+    {
+        auto res = factory->getGeoidModels("6357"); // "NAVD88 depth"
+        checkNavd88(res);
+    }
+    {
+        auto res = factory->getGeoidModels("6358"); // "NAVD88 depth (ftUS)"
+        checkNavd88(res);
+    }
+
+    {
+        auto res = factory->getGeoidModels("5701"); // "ODN height"
+        checkOdn(res);
+    }
+    {
+        auto res = factory->getGeoidModels("5732"); // "Belfast height"
+        checkOdn(res);
+    }
+}
+
 // ---------------------------------------------------------------------------
 
 TEST_F(FactoryWithTmpDatabase,