On Mon, Feb 15, 2010 at 03:51:40PM +0800, Ben Madin wrote:
> NOTICE: TopologyException: found non-noded intersection between LINESTRING
> (-0.204257 0.999226, -0.204257 0.99858) and LINESTRING (-0.204257 0.995743,
> -0.204257 0.999226) at -0.204257 0.999226
> How does the coordinates returned by the error relate to my geometry? or What
> do they mean? Can I use this information to find the problem part of the
> geometry.
Often such problems are due to invalid geometries in input.
What you could do is:
SELECT gid, ST_isValidReason(the_geom) where NOT ST_isValid(the_geom);
That should give you more usable informations.
Even better, the trunk version of postgis has an ST_isValidDetail which also
gives you the problematic point as a Geometry.
--strk;
() Free GIS & Flash consultant/developer
/\ http://foo.keybit.net/~strk/services.html
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