Le 2/03/2010 10:35, Nicola Zandonà a écrit :
I have a set of point extracted from longitude and latitude coordinates.
I'd like to circumscribe those points inside a polygon.
Can I solve this problem with an aggregate function?
Yes, I think you are looking for ST_ConvexHull :
http://postgis.refractions.net/documentation/manual-1.5/ST_ConvexHull.html
This is not an aggregate function so you have to aggregate your point
geometries before calling it. You can use ST_Collect for that.
Regards
--
Arnaud
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