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

[Mark Cave-Ayland]

Aleš Kecman wrote:
> Hi!
> 
> 
> I'm new to Postgis and would really like to get some help on getting a 
> concave hull from an array of points.
> 
> For example:
> 
> I have an array of points - longitude and latitude of buildings in 
> particular area in the city. I already managed to get a convex hull 
> polygon from this array of points, but this is not really helpful. What 
> I'm trying to get is some kind of concave hull polygon from an array of 
> points, which I would further like to use in Google Earth kml file.
> 
> Thanks.


Hi Aleš,

Does ST_Union() help you at all?


ATB,

Mark.

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Mark Cave-Ayland
Sirius Corporation - The Open Source Experts
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