vogelfreier
sorry: i had seeing over "Texas Ortophoto" here buildings - what is between the building - can be a private garden. To map self, you can find information about 1. tool the ID-Editor http://wiki.openstreetmap.org/wiki/ID or 2. tool the better way with the JavaOpenStreetMap-Eidtor http://josm.openstreetmap.de/ . For other information see http://wiki.openstreetmap.org/wiki/Main_Page . Regards from Germany Rüdiger