[postgis-users] Problem with ST_ExteriorRing and ST_contains

[strk]

On Thu, May 20, 2010 at 12:14:55PM +0200, didier peeters wrote:
> Hello Nicolas,
> 
> Thanks for this quick and useful answer.  
> When I run the ST_IsValidReason on the rings it surprisingly doesn't find any error but when I run it on the original polygon layer I get errors like "Ring Self-intersection[-2.14772 42.5812]" which is what I expected.  

Which version of GEOS are you using ?
The latest release contains a fix for false positives.

--strk;

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