If I have a table of the following form: id (integer) event_time (timestamp) lat_lon (polygon) 3497 1977-01-01 00:00:00 ((-64.997,45.975),(,(-64.9981,45.975),(-64.8981,45.875),(-64.9978,45.9751)) 3431 2007-06-06 01:00:00 ((-64.971,45.982),(-64.921,45.982),(-64.972,45.982),(-64.973,45.98209),(-64.97,45.98237)) 3498 1977-01-01 00:00:00 ((-64.97838,45.9778),(-64.9783,45.97767),(-64.978,45.977),(-64.9781,45.97728),(-64.9781,45.97714),(-64.977,45.976)) ... How would I return a list of the latest events for a particular lat/lon region? More precisely, how would a return a result set with the greatest event times with polygons that don't intersect any other polygon in the result set? Any help would be greatly appreciated, Dave -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general