#243 Feature without geometry

* fixes GDALException in case of provided feature (import) without geometry content
* modifies 500.html template to inform the user about the admins being informed automatically

konova/forms/geometry_form.py

@@ -82,7 +82,12 @@ class SimpleGeomForm(BaseForm):
             "MultiPolygon25D",
         ]
         for feature in features_json:
-            feature_geom = json.dumps(feature.get("geometry", feature))
+            feature_geom = feature.get("geometry", feature)
+            if feature_geom is None:
+                # Fallback for rare cases where a feature does not contain any geometry
+                continue
+
+            feature_geom = json.dumps(feature_geom)
             g = gdal.OGRGeometry(feature_geom, srs=DEFAULT_SRID_RLP)
 
             flatten_geometry = g.coord_dim > 2