Hi Erik,
SELECT gid, ST_ConvexHull(ST_Collect(pts)) FROM (SELECT gid, ST_PointOnSurface((ST_dump(geometry)).geom) AS pts FROM yourTable) AS foo GROUP BY gid Fred. On Tue, Sep 16, 2008 at 2:06 PM, erik <[EMAIL PROTECTED]> wrote: > Hi, > > I'm not sure I know how to formulate this > I have a set of Multipolygons. I'd like to link somehow the polygons of > each multipolygon with a "string", an arc, that expresses their belonging > to the same polygon. > > Is this possible, is there some predefined function that could accomplish > this? > > Many thanks, > > Erik > > _______________________________________________ > postgis-users mailing list > [email protected] > http://postgis.refractions.net/mailman/listinfo/postgis-users > >
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