Removing geoa Geometry class and updating docs

doc/db_geoa.rst

@@ -37,14 +37,10 @@ Creating simple model
 ---------------------
 
 GeoAlchemy comes with a `Geometry`_ field that is carefully divorced from the
-`Shapely`_ library. Flask-Admin takes the approach that if you're using spatial
-objects in your database, and you want an admin interface to edit those objects,
-you're probably already using Shapely, so we provide a Geometry field that is
-integrated with Shapely objects. To make your admin interface works, be sure to
-use this field rather that the one that ships with GeoAlchemy when defining your
-models::
-
-    from flask.ext.admin.contrib.geoa.sqltypes import Geometry
+`Shapely`_ library. Flask-Admin will use this field so that there are no changes necessary to other code. ``ModelView`` should be imported from ``geoa`` rather than the one imported from ``sqla``::
+
+    from geoalchemy2 import Geometry
+    from flask.ext.admin.contrib.geoa import ModelView
 
     # .. flask initialization
     db = SQLAlchemy(app)

flask_admin/contrib/geoa/sqltypes.py

-from geoalchemy2 import Geometry as BaseGeometry
-from geoalchemy2.shape import to_shape
-
-
-class Geometry(BaseGeometry):
-    """
-    PostGIS datatype that can convert directly to/from Shapely objects,
-    without worrying about WKTElements or WKBElements.
-    """
-    def result_processor(self, dialect, coltype):
-        to_wkbelement = super(Geometry, self).result_processor(dialect, coltype)
-
-        def process(value):
-            if value:
-                return to_shape(to_wkbelement(value))
-            else:
-                return None
-        return process
-
-    def bind_processor(self, dialect):
-        from_wktelement = super(Geometry, self).bind_processor(dialect)
-
-        def process(value):
-            if value:
-                return from_wktelement(value.wkt)
-            else:
-                return None
-        return process