[postgis-users] Problems following the Examples Overlay Tables on Wiki
chris.hermansen at timberline.ca
Tue Oct 16 17:55:35 PDT 2007
Ladies and gentlemen;
I'm trying to follow the Wiki example by Kevin Neufeld on overlaying tables.
I get all my linework from my two polygon tables into a third table just
When I get to the point of noding, up comes the following situation:
dustin=# CREATE TABLE step2 AS
dustin-# SELECT st_union(geom) AS geom
dustin-# FROM step1;
NOTICE: TopologyException: found non-noded intersection between
1.40568e+06 507103, 1.40568e+06 507100 and 1.40568e+06 507100,
1.40568e+06 507100 1.40568e+06 507100
ERROR: GEOS union() threw an error!
I find this greatly puzzling as I thought the whole point of this
exercise was to put nodes into the linework... I must be missing
something very simple!
This is PostGIS 1.3.1 and GEOS 3.0.0.RC4 running against vanilla Ubuntu
7.04 PostgreSQL, I think 8.2.
Thanks in advance!
Chris Hermansen · mailto:clh at timberline.ca
tel:+1.604.714.2878 · fax:+1.604.733.0631
Timberline Natural Resource Group · http://www.timberline.ca
401 · 958 West 8th Avenue · Vancouver BC · Canada · V5Z 1E5
C'est ma façon de parler.
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