[postgis-devel] Weird ST_Intersection behavior

[George Silva]

Duh! True, sorry to bother :D Very sorry.

My bad

George

On Tue, May 25, 2010 at 1:11 PM, Martin Davis <mbdavis at refractions.net>wrote:

> The Polygon is not valid - it is "twisted" in the middle.
>
> George Silva wrote:
>
>> Hello guys, I'm not sure this is the right place. I'm getting GEOS
>> exceptions while doing simple ST_Intersection calculations.
>>
>> Check this out:
>>
>> "POSTGIS="1.4.0" GEOS="3.1.1-CAPI-1.6.0" PROJ="Rel. 4.6.1, 21 August 2008"
>> USE_STATS"
>>
>> SELECT ST_Intersection(
>>    ST_GeomFromText('POLYGON((0 0, 1 1, 1 0, 0 1, 0
>> 0))'),ST_GeomFromText('LINESTRING(-1 -1, 2 2)'));
>>
>> NOTICE:  TopologyException: found non-noded intersection between 0 0, 1
>> 1NG
>> ( and 1 0, 0.5 0.5 0.5 0.5
>> ERROR:  GEOS Intersection() threw an error!
>>
>> ********** Error **********
>>
>> ERROR: GEOS Intersection() threw an error!
>> SQL state: XX000
>>
>> Any hints?
>>
>> Thanks
>>
>>  ------------------------------------------------------------------------
>>
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>>
>>
>
> --
> Martin Davis
> Senior Technical Architect
> Refractions Research, Inc.
> (250) 383-3022
>
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>



-- 
George R. C. Silva

Desenvolvimento em GIS
http://blog.geoprocessamento.net
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