[postgis-users] making polygons from center + vertex

[Arnaud Sahuguet]

thanks.

Arnaud

On Wed, Aug 11, 2010 at 10:04 PM, Francis Markham <fmarkham at gmail.com>wrote:

> Sure is, check out the ST_Buffer function
> http://postgis.refractions.net/docs/ST_Buffer.html
>   ST_Buffer(geometry g1, float radius_of_buffer);
>
> If you give it a point as g1, and the radius of the circle it will
> calculate a pseduo-circular polygon for you.  If you have two points
> g1 and g2 you could use ST_Buffer(g1, ST_Distance(g1, g2));
>
> -Francis
>
> On 12 August 2010 11:36, Arnaud Sahuguet <arnaud.sahuguet at gmail.com>
> wrote:
> >
> > I found this really neat Google Maps example where you can draw polygons
> using 2 points: the center and one vertex.
> > See http://www.barnabu.co.uk/geapi/polyplot/
> > Is there a POST GIS function to create the corresponding polygon?
> >
> > regards,
> >
> > --
> > Arnaud Sahuguet
> >
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> >
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-- 
Arnaud Sahuguet
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