[geos-devel] [GEOS] #588: valid polygon when cw, not valid when ccw

GEOS geos-trac at osgeo.org
Wed Sep 12 03:25:58 PDT 2012

#588: valid polygon when cw, not valid when ccw
 Reporter:  olivier80   |       Owner:  geos-devel@…              
     Type:  defect      |      Status:  new                       
 Priority:  major       |   Milestone:  3.3.6                     
Component:  Default     |     Version:  3.3.5                     
 Severity:  Unassigned  |    Keywords:                            

Comment(by olivier80):

 Unfortunately, I'm not a postgis user, I use geos with the C api. This
 polygon is a simplified version of a GEOSBufferWithStyle() result. I keep
 only the problematic points (87.9271046586986810 -10.5302909001479570 and
 87.9271046586986810 -10.5302909001479530). The distance between those two
 points is nothing and yes, you're right, simplifying should fix.

Ticket URL: <http://trac.osgeo.org/geos/ticket/588#comment:4>
GEOS <http://geos.refractions.net/>
GEOS (Geometry Engine - Open Source) is a C++ port of the Java Topology Suite (JTS).

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