Stan, I think the answer is no. For example if you have a polygon with holes, the centroid may very well lie in the hole. Leo
_____ From: [email protected] [mailto:[email protected]] On Behalf Of Sufficool, Stanley Sent: Friday, May 01, 2009 4:53 PM To: PostGIS Users Discussion Subject: [postgis-users] st_centroid Points not on Polygon I'm sure I ran across this in the forums a year ago, but: Is the st_centroid function guaranteed to return a point that lies on the polygon? I have instances when my display doe not place it on the polygon when using st_centroid(st_intersection(the_geom, <WKT BBOX>)); Thanks in advance.
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