Here is their web page:
http://postgis.refractions.net/
I am probably not the best to answer how it is used because we use it just
to allow index on spatial data (coordinates). You may ask on the postgis
mailing list.
Woody
_____
From: pgsql-general-owner(at)postgresql(dot)org
[mailto:pgsql-general-owner(at)postgresql(dot)org] On Behalf Of Bob Pawley
Sent: Thursday, October 19, 2006 11:09 AM
To: Postgresql
Subject: [GENERAL] PostGIS
Can anyone point me to an overview of PostGIS and how it is being used???
Bob Pawley