[postgis-tickets] [PostGIS] #3402: geometry crosses edges with 0 tolerance

[PostGIS]

#3402: geometry crosses edges with 0 tolerance
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  Reporter:  strk      |      Owner:  strk
      Type:  defect    |     Status:  new
  Priority:  medium    |  Milestone:  PostGIS 2.1.9
 Component:  topology  |    Version:  2.1.x
Resolution:            |   Keywords:
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Comment (by strk):

 Just a note: the 4-vertices input had all vertices distance not less than
 0.01 units:
 {{{
 0102000000040000001F85EB1117273941F6285CEFAC9652411F85EB5119283941F6285CEF2D9652411F85EB5128283941F6285CCF2C9652411F85EBD160273941000000E0DA965241
 }}}

 Thus the 5e-10 distance vertex has been generated as part of the noding.
 For a computed tolerance of ~2e-8 such case should be avoided, and can be
 avoided by passing the noded input through ST_RemoveRepeatedPoint with a
 tolerance (or one day by using the new PrecisionModel support in
 GEOS-3.5).

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Ticket URL: <https://trac.osgeo.org/postgis/ticket/3402#comment:13>
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