[1.1.X] Added another GDAL bug workaround for retrieving the correct coordinate dimension on geometry collections. Refs #12312.

jbronn · jbronn · commit 8ef5daeb4f0e · 2010-03-29T21:58:48.000Z
Backport of r12883 from trunk. git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.1.X@12884 bcc190cf-cafb-0310-a4f2-bffc1f526a37
diff --git a/django/contrib/gis/gdal/geometries.py b/django/contrib/gis/gdal/geometries.py
@@ -181,6 +181,14 @@ def dimension(self):
 
     def _get_coord_dim(self):
         "Returns the coordinate dimension of the Geometry."
+        if isinstance(self, GeometryCollection) and GDAL_VERSION < (1, 5, 2):
+            # On GDAL versions prior to 1.5.2, there exists a bug in which
+            # the coordinate dimension of geometry collections is always 2:
+            #   http://trac.osgeo.org/gdal/ticket/2334
+            # Here we workaround by returning the coordinate dimension of the
+            # first geometry in the collection instead.
+            if len(self):
+                return capi.get_coord_dim(capi.get_geom_ref(self.ptr, 0))
         return capi.get_coord_dim(self.ptr)
 
     def _set_coord_dim(self, dim):
