[postgis-tickets] [PostGIS] #3357: Polygon intersection with line fails for geography

PostGIS trac at osgeo.org
Fri Nov 6 05:41:42 PST 2015


#3357: Polygon intersection with line fails for geography
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  Reporter:  radu123  |      Owner:  pramsey
      Type:  defect   |     Status:  new
  Priority:  high     |  Milestone:  PostGIS 2.2.1
 Component:  postgis  |    Version:  2.2.x
Resolution:           |   Keywords:
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Comment (by pramsey):

 Your line isn't straight like in your picture, it's actually straight in a
 different way, as a great circle arc (which, in your picture would be a
 northerly curve). Think about how an airplane would get between the ends
 of your line. Reasoning about geography on flat maps leads to mistakes
 like this.

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Ticket URL: <https://trac.osgeo.org/postgis/ticket/3357#comment:3>
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