Maxime van Noppen wrote:
Paul Ramsey wrote:
Use ST_Centroid() then. It's just the mid-point of the bbox, so it's
fast to calculate.
It might be outside the polygon though.
In which case, if it matters, use ST_PointOnSurface().
Paul, just a clarification, I believe centroid calculates the geometric centre of a geoemtry or "centre of mass" and not
the mid-point of the bbox. Here are a few pictorial examples:
http://postgis.org/documentation/manual-1.5SVN/ST_Centroid.html
-- Kevin
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