Fixed #24207 -- Added 25D-type geometry field support to ogrinspect

Thanks Michael Diener for the report and sample data, and Tim Graham
for the review.

django/contrib/gis/gdal/geomtype.py

@@ -85,3 +85,11 @@ class OGRGeomType(object):
         elif s == 'Unknown':
             s = 'Geometry'
         return s + 'Field'
+
+    def to_multi(self):
+        """
+        Transform Point, LineString, Polygon, and their 25D equivalents
+        to their Multi... counterpart.
+        """
+        if self.name.startswith(('Point', 'LineString', 'Polygon')):
+            self.num += 3

django/contrib/gis/utils/ogrinspect.py

@@ -43,11 +43,9 @@ def mapping(data_source, geom_name='geom', layer_key=0, multi_geom=False):
             mfield += 'field'
         _mapping[mfield] = field
     gtype = data_source[layer_key].geom_type
-    if multi_geom and gtype.num in (1, 2, 3):
-        prefix = 'MULTI'
-    else:
-        prefix = ''
-    _mapping[geom_name] = prefix + str(gtype).upper()
+    if multi_geom:
+        gtype.to_multi()
+    _mapping[geom_name] = str(gtype).upper()
     return _mapping
 
 
@@ -210,10 +208,9 @@ def _ogrinspect(data_source, model_name, geom_name='geom', layer_key=0, srid=Non
 
     # TODO: Autodetection of multigeometry types (see #7218).
     gtype = layer.geom_type
-    if multi_geom and gtype.num in (1, 2, 3):
-        geom_field = 'Multi%s' % gtype.django
-    else:
-        geom_field = gtype.django
+    if multi_geom:
+        gtype.to_multi()
+    geom_field = gtype.django
 
     # Setting up the SRID keyword string.
     if srid is None:

tests/gis_tests/data/gas_lines/gas_leitung.prj

@@ -0,0 +1 @@
+PROJCS["MGI_Ferro_Austria_GK_East",GEOGCS["GCS_MGI_Ferro",DATUM["D_MGI",SPHEROID["Bessel_1841",6377397.155,299.1528128]],PRIMEM["Ferro",-17.66666666666667],UNIT["Degree",0.0174532925199433]],PROJECTION["Transverse_Mercator"],PARAMETER["False_Easting",0.0],PARAMETER["False_Northing",-5000000.0],PARAMETER["Central_Meridian",34.0],PARAMETER["Scale_Factor",1.0],PARAMETER["Latitude_Of_Origin",0.0],UNIT["Meter",1.0]]

tests/gis_tests/inspectapp/tests.py

@@ -91,6 +91,10 @@ class OGRInspectTest(TestCase):
         shp_file = os.path.join(TEST_DATA, 'test_poly', 'test_poly.shp')
         model_def = ogrinspect(shp_file, 'MyModel', multi_geom=True)
         self.assertIn('geom = models.MultiPolygonField(srid=-1)', model_def)
+        # Same test with a 25D-type geometry field
+        shp_file = os.path.join(TEST_DATA, 'gas_lines', 'gas_leitung.shp')
+        model_def = ogrinspect(shp_file, 'MyModel', multi_geom=True)
+        self.assertIn('geom = models.MultiLineStringField(srid=-1)', model_def)
 
     def test_date_field(self):
         shp_file = os.path.join(TEST_DATA, 'cities', 'cities.shp')