konova/forms/geometry_form.py

@@ -54,7 +54,7 @@ class SimpleGeomForm(BaseForm):
             geom = json.dumps(geojson)
         except AttributeError:
             # If no geometry exists for this form, we simply set the value to None and zoom to the maximum level
-            geom = ""
+            geom = json.dumps({})
             self.empty = True
 
         self.initialize_form_field("output", geom)