Hi,
I'm looking for a way to merge two overlapping polygons with a sql
statement. I've been searching/trying things for a while and still no
results.
So far, I'm able to merge all polygons in one using :
SELECT GeomUnion(geom) FROM (SELECT (dump(the_geom)).geom FROM mytable)
AS s;
but if I have a third polygon not overlapping the other two, it
returns a single multipolygon with all three together.
Any hint ?
--
Alexandre Dubé
Mapgears
www.mapgears.com
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