Add support for creating coordinates operations using Natural Earth/Natural Earth 2 projection

4 files changed, 43 insertions, 2 deletions

diff --git a/include/proj/internal/coordinateoperation_constants.hpp b/include/proj/internal/coordinateoperation_constants.hpp
index 6b456610..c3ae77ee 100644
--- a/include/proj/internal/coordinateoperation_constants.hpp
+++ b/include/proj/internal/coordinateoperation_constants.hpp
@@ -697,6 +697,12 @@ static const MethodMapping projectionMethodMappings[] = {
     {PROJ_WKT2_NAME_METHOD_MOLLWEIDE, 0, "Mollweide", "moll", nullptr,
      paramsLonNatOrigin},
 
+    {PROJ_WKT2_NAME_METHOD_NATURAL_EARTH, 0, "Natural_Earth", "natearth",
+     nullptr, paramsLonNatOrigin},
+
+    {PROJ_WKT2_NAME_METHOD_NATURAL_EARTH_II, 0, "Natural_Earth_II", "natearth2",
+     nullptr, paramsLonNatOrigin},
+
     {EPSG_NAME_METHOD_NZMG, EPSG_CODE_METHOD_NZMG, "New_Zealand_Map_Grid",
      "nzmg", nullptr, paramsNatOrigin},
 
diff --git a/include/proj/internal/esri_projection_mappings.hpp b/include/proj/internal/esri_projection_mappings.hpp
index 1248a5fa..67e226ed 100644
--- a/include/proj/internal/esri_projection_mappings.hpp
+++ b/include/proj/internal/esri_projection_mappings.hpp
@@ -747,6 +747,24 @@ static const ESRIParamMapping paramsESRI_Wagner_VII[] = {
      EPSG_CODE_PARAMETER_LONGITUDE_OF_NATURAL_ORIGIN, 0.0},
     {nullptr, nullptr, 0, 0.0}};
 
+static const ESRIParamMapping paramsESRI_Natural_Earth[] = {
+    {"False_Easting", EPSG_NAME_PARAMETER_FALSE_EASTING,
+     EPSG_CODE_PARAMETER_FALSE_EASTING, 0.0},
+    {"False_Northing", EPSG_NAME_PARAMETER_FALSE_NORTHING,
+     EPSG_CODE_PARAMETER_FALSE_NORTHING, 0.0},
+    {"Central_Meridian", EPSG_NAME_PARAMETER_LONGITUDE_OF_NATURAL_ORIGIN,
+     EPSG_CODE_PARAMETER_LONGITUDE_OF_NATURAL_ORIGIN, 0.0},
+    {nullptr, nullptr, 0, 0.0}};
+
+static const ESRIParamMapping paramsESRI_Natural_Earth_II[] = {
+    {"False_Easting", EPSG_NAME_PARAMETER_FALSE_EASTING,
+     EPSG_CODE_PARAMETER_FALSE_EASTING, 0.0},
+    {"False_Northing", EPSG_NAME_PARAMETER_FALSE_NORTHING,
+     EPSG_CODE_PARAMETER_FALSE_NORTHING, 0.0},
+    {"Central_Meridian", EPSG_NAME_PARAMETER_LONGITUDE_OF_NATURAL_ORIGIN,
+     EPSG_CODE_PARAMETER_LONGITUDE_OF_NATURAL_ORIGIN, 0.0},
+    {nullptr, nullptr, 0, 0.0}};
+
 static const ESRIParamMapping paramsESRI_Patterson[] = {
     {"False_Easting", EPSG_NAME_PARAMETER_FALSE_EASTING,
      EPSG_CODE_PARAMETER_FALSE_EASTING, 0.0},
@@ -905,6 +923,10 @@ static const ESRIMethodMapping esriMappings[] = {
     {"Wagner_IV", PROJ_WKT2_NAME_METHOD_WAGNER_IV, 0, paramsESRI_Wagner_IV},
     {"Wagner_V", PROJ_WKT2_NAME_METHOD_WAGNER_V, 0, paramsESRI_Wagner_V},
     {"Wagner_VII", PROJ_WKT2_NAME_METHOD_WAGNER_VII, 0, paramsESRI_Wagner_VII},
+    {"Natural_Earth", PROJ_WKT2_NAME_METHOD_NATURAL_EARTH, 0,
+     paramsESRI_Natural_Earth},
+    {"Natural_Earth_II", PROJ_WKT2_NAME_METHOD_NATURAL_EARTH_II, 0,
+     paramsESRI_Natural_Earth_II},
     {"Patterson", PROJ_WKT2_NAME_METHOD_PATTERSON, 0, paramsESRI_Patterson},
     {"Geostationary_Satellite",
      PROJ_WKT2_NAME_METHOD_GEOSTATIONARY_SATELLITE_SWEEP_Y, 0,
diff --git a/scripts/build_esri_projection_mapping.py b/scripts/build_esri_projection_mapping.py
index 0722f7aa..9a3c90b6 100644
--- a/scripts/build_esri_projection_mapping.py
+++ b/scripts/build_esri_projection_mapping.py
@@ -593,9 +593,19 @@ config_str = """
         - False_Northing: EPSG_NAME_PARAMETER_FALSE_NORTHING
         - Central_Meridian: EPSG_NAME_PARAMETER_LONGITUDE_OF_NATURAL_ORIGIN
 
-# Natural_Earth: not handled
+- Natural_Earth:
+    WKT2_name: PROJ_WKT2_NAME_METHOD_NATURAL_EARTH
+    Params:
+        - False_Easting: EPSG_NAME_PARAMETER_FALSE_EASTING
+        - False_Northing: EPSG_NAME_PARAMETER_FALSE_NORTHING
+        - Central_Meridian: EPSG_NAME_PARAMETER_LONGITUDE_OF_NATURAL_ORIGIN
 
-# Natural_Earth_II: not handled
+- Natural_Earth_II:
+    WKT2_name: PROJ_WKT2_NAME_METHOD_NATURAL_EARTH_II
+    Params:
+        - False_Easting: EPSG_NAME_PARAMETER_FALSE_EASTING
+        - False_Northing: EPSG_NAME_PARAMETER_FALSE_NORTHING
+        - Central_Meridian: EPSG_NAME_PARAMETER_LONGITUDE_OF_NATURAL_ORIGIN
 
 - Patterson:
     WKT2_name: PROJ_WKT2_NAME_METHOD_PATTERSON
diff --git a/src/proj_constants.h b/src/proj_constants.h
index f16f797f..b1059d89 100644
--- a/src/proj_constants.h
+++ b/src/proj_constants.h
@@ -167,6 +167,9 @@
 
 #define PROJ_WKT2_NAME_METHOD_MOLLWEIDE "Mollweide"
 
+#define PROJ_WKT2_NAME_METHOD_NATURAL_EARTH "Natural Earth"
+#define PROJ_WKT2_NAME_METHOD_NATURAL_EARTH_II "Natural Earth II"
+
 #define  EPSG_NAME_METHOD_OBLIQUE_STEREOGRAPHIC "Oblique Stereographic"
 #define EPSG_CODE_METHOD_OBLIQUE_STEREOGRAPHIC 9809