[postgis-users] Get concave hull from an array of longitude inlatitude points

[Rob Tester]

I think you were hit by the blind stick.

The license is LGPL and QPL. They will sell you a commercial license if you
require one.


http://www.cgal.org/Manual/3.3/doc_html/cgal_manual/Alpha_shapes_2/Chapter_m
ain.html


This chapter is all about alpha shapes (which can be concave or convex).



-----Original Message-----
From: postgis-users-bounces at postgis.refractions.net
[mailto:postgis-users-bounces at postgis.refractions.net] On Behalf Of Tim
Bowden
Sent: Tuesday, November 25, 2008 1:25 PM
To: PostGIS Users Discussion
Subject: RE: [postgis-users] Get concave hull from an array of longitude
inlatitude points


On Tue, 2008-11-25 at 06:22 -0700, Rob Tester wrote:
> CGAL has an open source implementation of the algorithm. (Along with some
> other really neat things like vonoroi).
> 
> http://www.cgal.org/
> 
There is certainly some quite interesting (mostly non free) stuff there.
I can see an lgpl convex hull module but not concave unless I've been
hit with the blind stick.

Regards,
Tim

>  
-- 
Experience is that marvelous thing that enables you recognize a mistake
when you make it again.

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