Para llamar a OSM Roads
(select id, osm_id,osm_uid,osm_version,osm_timestamp,way from osm_roads) as osm_roads
-83.673338 36.540816,-75.245877 39.465979
Para llaamr a TIGER Roads
(SELECT gid, geom FROM roads_t2012) as tiger
-83.673338 36.540816,-75.245877 39.465979