<html><body><div style="color:#000; background-color:#fff; font-family:verdana, helvetica, sans-serif;font-size:10pt"><div><span>Sandro, thanks for your reply. You're right about "folding postgis 7 times" :-)</span></div><div><br><span></span></div><div><span>I'm having difficulties in isolating the offending geometries, which is mainly due to my lack of knowledge.</span></div><div><br><span></span></div><div><span>When I look at the location at </span>59647.5 392932 there is no intersection. Only when I use buffer(geom,1) there are two objects, one of them being a funny line of three points but still identified by PG as polygon. <br></div><div><br></div><div>So I'm a bit lost now. I will continue to try to isolate a few features to consistently reproduce the problem.</div><div><br></div><div>Ge<br></div><div><br></div><div style="font-family: verdana, helvetica, sans-serif; font-size: 10pt;"><div style="font-family: times new roman, new york,
times, serif; font-size: 12pt;"><font face="Arial" size="2"><hr size="1"><b><span style="font-weight:bold;">From:</span></b> Sandro Santilli <strk@keybit.net><br><b><span style="font-weight: bold;">To:</span></b> G. van Es <gves2000@yahoo.com>; PostGIS Users Discussion <postgis-users@postgis.refractions.net><br><b><span style="font-weight: bold;">Sent:</span></b> Wednesday, September 21, 2011 8:52 AM<br><b><span style="font-weight: bold;">Subject:</span></b> Re: [postgis-users] ST_Insersection problem<br></font><br>On Tue, Sep 20, 2011 at 11:01:23PM -0700, G. van Es wrote:<br>> Well, ST_SnapToGrid seems to work a little better we get now TopologyException: side location conflict at 59647.5 392932<br>> <br>> Still GOES seems to crash on Intersection()...... <br>> It's a bit funny since all data is produced by PostGis and now PostGis<br>> can't handle it's own data.<br><br>Well, it's a robustness problem.<br>Try
folding a piece of paper for more than 7 times. It's a similar issue.<br><br>If you can isolate the offending operands I might take a closer look.<br>Please file a ticket for it.<br><br>--strk;<br><br> () Free GIS & Flash consultant/developer<br> /\ <a href="http://strk.keybit.net/services.html" target="_blank">http://strk.keybit.net/services.html</a><br><br><br></div></div></div></body></html>