[postgis-users] Average Two Polygons.

[strk at refractions.net]

On Sun, May 07, 2006 at 12:14:53PM -0700, Jason C. Leach wrote:
> Hi,
> 
> Lets say I have two slightly different polygons representing the same
> physical area. Both are accurate but not identical. Is there a way in
> PostGIS to average the two polygons to produce a third data set?

You might use geomunion(poly1, poly2) to get a topological union
of the two areas, or intersection(poly1, poly2) for their
intersection. See what better fits your needs.

--strk;