[jts-devel] Re: [postgis-users] problem with intersection

[strk at refractions.net]

I confirm the same error is returned compiling postgis against libjts
(from JTS cvs as of some weeks ago):

psql:intersect_bug.sql:4: NOTICE:  no outgoing dirEdge found [ (588928.6000000002, 2432123.7, NaN) ]
psql:intersect_bug.sql:4: ERROR:  JTS Intersection() threw an error!
 
--strk;

On Thu, Apr 07, 2005 at 03:15:25AM -0400, dblasby at openplans.org wrote:
> Martin Davis,
> 
> Here's another test case for intersection() for your JTS testcase pile. 
> This one's from the PostGIS list.
> 
> com.vividsolutions.jts.geom.TopologyException: no outgoing dirEdge found
> [ (588928.6000000002, 2432123.7, NaN) ]
> 	at
> com.vividsolutions.jts.geomgraph.DirectedEdgeStar.linkResultDirectedEdges(DirectedEdgeStar.java:241)
> ..
> 
> 
> 
> public class test {
> 
> 	public static void main(String[] args)
> 	{
> 		try
> 		{
> 			WKTReader r = new WKTReader();
> 			Geometry g1 = r.read("POLYGON((588912.7 2432104.5,588927.7 2432124,
> 588928.9 2432123.6, 588923.7 2432132.3,588912.7 2432104.5))");
> 			Geometry g2 = r.read("POLYGON((588916.4 2432124.4, 588920.7
> 2432129.9,588928.6 2432123.7,588930.1 2432122.6,588916.4 2432124.4))");
> 			System.out.println("isvalid(g1) = "+ g1.isValid());
> 			System.out.println("isvalid(g2) = "+ g2.isValid());
> 			Geometry g3 = g1.intersection(g2);
> 			System.out.println("g3="+g3.toText());
> 		}
> 		catch(Exception e)
> 		{
> 			e.printStackTrace();
> 		}
> 	}
> }
> 
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