For those people who have unions to do that are slow, feel free to try out this aggregate union function.
I haven't tested it enough for it to make it into 1.3.4, but have included a link to the source code in the wiki. It should work just fine on PostGIS versions 1.2.2 and above. http://postgis.refractions.net/support/wiki/index.php?PL%2FPGSQL%20Pseudo%20 Cascade%20Union%20Aggregate%20Function Let me know if you run into any problems with it. It has worked well for the samples I have used it on. Thanks, Regina _______________________________________________ postgis-users mailing list postgis-users@postgis.refractions.net http://postgis.refractions.net/mailman/listinfo/postgis-users