[geos-devel] [GEOS] #559: EMPTY Centroid of tiny triangular polygon

GEOS geos-trac at osgeo.org
Fri Jun 22 06:34:58 PDT 2012

#559: EMPTY Centroid of tiny triangular polygon
 Reporter:  strk        |       Owner:  geos-devel@…              
     Type:  defect      |      Status:  new                       
 Priority:  major       |   Milestone:  3.3.5                     
Component:  Default     |     Version:  3.3.4                     
 Severity:  Unassigned  |    Keywords:                            

Comment(by strk):

 Sorry, I had the wrong WKT. The one in the orginal post works, this one is
 the one that fails:
 56.528666666700 25.2101666667,
 56.529000000000 25.2105000000,
 56.528833333300 25.2103333333,
 56.528666666700 25.2101666667))

 The difference is in the least significant digit in the X ordinate of the
 second point.
 Both are valid. Area of the working one is 8.28966197710509e-17, area of
 the non-working one is 3.30872245021211e-24

Ticket URL: <http://trac.osgeo.org/geos/ticket/559#comment:2>
GEOS <http://geos.refractions.net/>
GEOS (Geometry Engine - Open Source) is a C++ port of the Java Topology Suite (JTS).

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