[postgis-users] Comparison of geometries

[strk at refractions.net]

On Wed, Feb 01, 2006 at 05:38:29PM +0100, Düster Horst wrote:
> Now I'm running into the next problem. 
> 
> TopologyException: side location conflict (625462,238372)
> ERROR:  GEOS equals() threw an error!
> 
> select count(wkb_geometry) from table where not issimple(wkb_geometry)
> 
> results no records. At the mentioned location 625462,238372 (Swiss
> coordinates) I can't discover any geometrical problem.

You should use isValid() to check validity, not isSimple().
--strk;