[geos-devel] Re: [GEOS] #323: A point interpolated from a line does not always intersect the same line

[GEOS]

#323: A point interpolated from a line does not always intersect the same line
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 Reporter:  starsareblue  |        Owner:  geos-devel at lists.osgeo.org
     Type:  defect        |       Status:  closed                    
 Priority:  major         |    Milestone:                            
Component:  Default       |      Version:  3.2.0                     
 Severity:  Unassigned    |   Resolution:  invalid                   
 Keywords:                |  
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Changes (by pramsey):

  * status:  new => closed
  * resolution:  => invalid

Comment:

 The point isn't on the line, it's just very very very close. But in double
 precision, the coordinate space is chunky, not infinitely dividable. Think
 about diagonal line in graph paper. If you can only represent points where
 the graph lines intersect, how many places on the diagonal line are
 exactly representable?

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Ticket URL: <http://trac.osgeo.org/geos/ticket/323#comment:1>
GEOS <http://geos.refractions.net/>
GEOS (Geometry Engine - Open Source) is a C++ port of the Java Topology Suite (JTS).