Hi, I have a table parcels , and I need obtain the list of the only interior parcels, the parcels is not overlap. I test ST_Contains(), ST_Intersects() but the result is not correct. Salas. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://postgis.refractions.net/pipermail/postgis-users/attachments/20091210/0eaba03d/attachment.html>