[postgis-users] convex hull

[Carl Anderson]

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 <src176 at psu.edu> 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 Universitysrc176 at psu.edu
> 814.865.9905
>
>
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>
>


-- 
Carl Anderson, GISP
carl.anderson at vadose.org
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