[postgis-users] Intersection not implemented for Multipolygon ?
strk at refractions.net
strk at refractions.net
Fri May 13 07:23:21 PDT 2005
You should be able to intersect two multipolygons (and see a
result if they DO intersect). If you find a discrepancy please
send a test case.
--strk;
On Fri, May 13, 2005 at 02:02:11PM +0200, "R. Müller" wrote:
> Hi Group,
>
> imagine following query:
>
> select astext(intersection(geom,boxgeom)) from table;
>
> 'table' is a table with a geometry-column of type 'geometry' because it
> mix up polygons and multipolygons.
> that means in the query above column 'geom' contains polygon and
> multipolygons.
> the boxgeom to intersect with is a simple constant box as a geometry.
> the resultset contains only values for the polygons not for the
> multipolygons, but throws no exceptions.
> i use postgres 7.4.7 and postgis 1.0RC2 with geos and proj4.
>
> any hint ?
>
> should i use only one geometry-type per table (for instance converting
> all polygons to multipolygons) ?
>
> thanks
>
> Ronald
>
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