You are asking about alpha shapes, see http://postgis.refractions.net/pipermail/postgis-users/2007-July/016321.html
C. On Tue, Jun 22, 2010 at 11:09 AM, Stephen Crawford <[email protected]> wrote: > All, > > I'm trying to get the polygon outline of a collection of points. I used > ConvexHull, and what I got was--hence the name--convex. Is there a way to > get a more exact outline? In my image below, the points are in purple and > the convex hull is in red. I want to get a poly that more closely matches > the points. > > Thanks, > Steve > > > -- > Stephen Crawford > Center for Environmental Informatics > The Pennsylvania State [email protected] > 814.865.9905 > > > _______________________________________________ > postgis-users mailing list > [email protected] > http://postgis.refractions.net/mailman/listinfo/postgis-users > > -- Carl Anderson, GISP [email protected]
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