[postgis-devel] [PostGIS] #1976: ST_Intersects() returns false while ST_Intersection returns a geography

[PostGIS]

#1976: ST_Intersects() returns false while ST_Intersection returns a geography
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  Reporter:  mhiper3pg  |       Owner:  pramsey      
      Type:  defect     |      Status:  closed       
  Priority:  medium     |   Milestone:  PostGIS 1.5.6
 Component:  postgis    |     Version:  1.5.X        
Resolution:  fixed      |    Keywords:               
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Changes (by pramsey):

  * status:  reopened => closed
  * resolution:  => fixed


Comment:

 Committed patches to trunk (r10527), 2.0 branch (r10528) and 1.5 branch
 (r10529). The problem was the point in ring algorithm flagging a small
 edge as being a crossing edge even though it wasn't, because of relatively
 loose tolerances and error introduced in the edge intersection
 calculations. The "solution" was a completely new edge intersection
 routine that hopefully introduces less error and is more robust for more
 cases.

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Ticket URL: <http://trac.osgeo.org/postgis/ticket/1976#comment:8>
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