Hello,

I have several problems while unioning or intersection two "big" polygons 
/ surfaces (gml to big to post). 

Some Geometries throw exceptions like this:
1. side location conflict [ (3536703.50390625, 6002840.29296875, NaN) ]
2. no outgoing dirEdge found [ (3633716.5743942726, 6007299.683068088, 
NaN) ]
3. found null Directed Edge

Normaly I use jts 1.7.
I try jts 1.8 and 1.9 but it have no positiv effects.

Here an example of the StackTrace:
com.vividsolutions.jts.geom.TopologyException: side location conflict [ 
(3592023.1542986925, 6004173.399640237, NaN) ]
        at 
com.vividsolutions.jts.geomgraph.EdgeEndStar.propagateSideLabels(EdgeEndStar.java:297)
        at 
com.vividsolutions.jts.geomgraph.EdgeEndStar.computeLabelling(EdgeEndStar.java:135)
        at 
com.vividsolutions.jts.geomgraph.DirectedEdgeStar.computeLabelling(DirectedEdgeStar.java:127)
        at 
com.vividsolutions.jts.operation.overlay.OverlayOp.computeLabelling(OverlayOp.java:364)
        at 
com.vividsolutions.jts.operation.overlay.OverlayOp.computeOverlay(OverlayOp.java:165)
        at 
com.vividsolutions.jts.operation.overlay.OverlayOp.getResultGeometry(OverlayOp.java:127)
        at 
com.vividsolutions.jts.operation.overlay.OverlayOp.overlayOp(OverlayOp.java:66)
        at com.vividsolutions.jts.geom.Geometry.union(Geometry.java:1067)
        at 
org.deegree.model.spatialschema.GeometryImpl.union(GeometryImpl.java:305)

What can I do now?

Bertram
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