I have also seen this error and I believe it is to do with identical geometries being unioned. I cleaned my dataset using someting like
select t1.id from points t1, points t2 where t1.id<>t2.id and st_equals(t1.geom,t2.geom)='t' group by t1.id to find all the duplicates which i then deleted. The st_union function then worked as expected. Jeff Whitaker wrote: > > John [H2O] wrote: >> Does anyone know what this error may result from: >> GEOS_ERROR: TopologyException: no outgoing dirEdge found >> (74.5584,-90,-90) >> Segmentation fault >> >> >> I am getting it for various projections and datasets... >> >> working with mpl_toolkits.basemap >> >> Thanks! >> > What versions of python, numpy, matplotlib, basemap and the GEOS library > do you have? > > -Jeff > > -- > Jeffrey S. Whitaker Phone : (303)497-6313 > Meteorologist FAX : (303)497-6449 > NOAA/OAR/PSD R/PSD1 Email : jeffrey.s.whita...@noaa.gov > 325 Broadway Office : Skaggs Research Cntr 1D-113 > Boulder, CO, USA 80303-3328 Web : http://tinyurl.com/5telg > > > ------------------------------------------------------------------------------ > Stay on top of everything new and different, both inside and > around Java (TM) technology - register by April 22, and save > $200 on the JavaOne (SM) conference, June 2-5, 2009, San Francisco. > 300 plus technical and hands-on sessions. Register today. > Use priority code J9JMT32. http://p.sf.net/sfu/p > _______________________________________________ > Matplotlib-users mailing list > Matplotlib-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/matplotlib-users > > -- View this message in context: http://old.nabble.com/GEOS-Error-tp23096254p26436982.html Sent from the matplotlib - users mailing list archive at Nabble.com. ------------------------------------------------------------------------------ Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day trial. Simplify your report design, integration and deployment - and focus on what you do best, core application coding. Discover what's new with Crystal Reports now. http://p.sf.net/sfu/bobj-july _______________________________________________ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
