I have to confess I'm not sure what the best or most current version is
- perhaps the list can help out?
Mark Mitchell wrote:
It is an older version of PostGIS/GEOS (1.3.3 and 2.2.3) -- which
version of GEOS are you using?
-Mark
Is this an older version of PostGIS/GEOS? I believe that most of these
kinds of problems were addressed in a release of GEOS last year.
Mark Mitchell wrote:
Anyone get an error similar to this when unioning a bunch of polygons
with st_union?
NOTICE: TopologyException: no outgoing dirEdge found (-149.073,61.6101,61.6101)
ERROR: GEOS union() threw an error!
I must say before I get into the details only a few of you will read
that portion that I've used postgis for a while now (since 1.1.5) and
it is *PHENOMENAL*. I don't want my only posts to this list in that
time frame to be negative -- can't tell you how much
faster/better/intuitive I've found postgis over very expensive
commercial alternatives :-).
My query is similar to the following:
SELECT st_multi(st_union(poly)) from (select ... (a bunch of polys) ... ) a;
The subselect is operating on a fairly dynamic table, and I've gone
months without any problems (with many different sets of polygons too)
I tried st_isvalid() on all polygons returned from the subselect, and
all are valid, and are all non-null...
If I have duplicate (or close to duplicate) polygons returned, is that
going to potentially screw up st_union()?
I'm running Ubuntu server (x64) 8.04 LTS, and am using the packages
for GEOS and postgis from their universe repo:
postgis 1.3.3
libgeos 2.2.3
(postgresql 8.3)
Thanks for the help!
-Mark
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--
Martin Davis
Senior Technical Architect
Refractions Research, Inc.
(250) 383-3022
_______________________________________________
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--
Martin Davis
Senior Technical Architect
Refractions Research, Inc.
(250) 383-3022
_______________________________________________
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