--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/web/lib/django/contrib/gis/db/models/sql/conversion.py	Wed Jan 20 00:34:04 2010 +0100
@@ -0,0 +1,29 @@
+"""
+This module holds simple classes used by GeoQuery.convert_values
+to convert geospatial values from the database.
+"""
+from django.contrib.gis.db.backend import SpatialBackend
+
+class BaseField(object):
+    def get_internal_type(self):
+        "Overloaded method so OracleQuery.convert_values doesn't balk."
+        return None
+
+if SpatialBackend.oracle: BaseField.empty_strings_allowed = False
+
+class AreaField(BaseField):
+    "Wrapper for Area values."
+    def __init__(self, area_att):
+        self.area_att = area_att
+
+class DistanceField(BaseField):
+    "Wrapper for Distance values."
+    def __init__(self, distance_att):
+        self.distance_att = distance_att
+
+class GeomField(BaseField):
+    """
+    Wrapper for Geometry values.  It is a lightweight alternative to 
+    using GeometryField (which requires a SQL query upon instantiation).
+    """
+    pass