[postgis-tickets] [PostGIS] #3401: ST_ModEdgeSplit makes topology invalid

[PostGIS]

#3401: ST_ModEdgeSplit makes topology invalid
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  Reporter:  strk      |      Owner:  strk
      Type:  defect    |     Status:  new
  Priority:  blocker   |  Milestone:  PostGIS 2.2.1
 Component:  topology  |    Version:  trunk
Resolution:            |   Keywords:  32bit
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Comment (by strk):

 Nicklas botton line is the roundtrip locate/interpolate doesn't yeld the
 original point. It would be normal if the original point was NOT on the
 line, but it isn't if the original point _is_ on the line.

 As long as the "location" is expressed as the fraction of total length the
 point is found at there will always be a truncation issue. I'm not sure
 this can be solved w/out changing how "location" is expressed (or
 completely avoiding to use locate/interpolate from ST_Split).

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Ticket URL: <https://trac.osgeo.org/postgis/ticket/3401#comment:17>
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