[postgis-users] st_intersection error
mbdavis at refractions.net
Tue Sep 15 08:54:03 PDT 2009
Same result in JTS.
As Nicklas points out, this is a problem of precision. The software is
working as designed, but it's not designed to use it to perform
intersections with a tolerance.
Some more sophisticated approach is required, such as vertex snapping
the lines to a given tolerance, or perhaps using a narrow buffer and
some sort of segment-based containment tests.
> On Tue, Sep 15, 2009 at 11:32:48AM +0200, DÃ¼ster Horst wrote:
>> I attached the geometries in my initial mail.
>> Take a look at aline1.sql and aline2.sql
> I confirm a POINT and a LINESTRING in a COLLECTION
> is returned by ST_Intersection() with latest version:
> POSTGIS="1.5.0SVN" GEOS="3.2.0-CAPI-1.6.0" PROJ="Rel. 4.6.0, 21 Dec 2007" USE_STATS
> Martin, how about JTS ?
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Senior Technical Architect
Refractions Research, Inc.
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