[PostGIS] #5782: TopoGeo_addLinestring corrups topology: adjacent edges 33 and -32 bind different face (1 and 0)

PostGIS trac at osgeo.org
Wed Sep 25 11:24:47 PDT 2024


#5782: TopoGeo_addLinestring corrups topology: adjacent edges 33 and -32 bind
different face (1 and 0)
--------------------------------+---------------------------
  Reporter:  Lars Aksel Opsahl  |      Owner:  strk
      Type:  defect             |     Status:  new
  Priority:  high               |  Milestone:  PostGIS 3.4.4
 Component:  topology           |    Version:
Resolution:                     |   Keywords:
--------------------------------+---------------------------
Comment (by mdavis):

 It seems problematic to rely on distance calculation to determine
 topology, since it's inherently less precise than the actual geometric
 situation.

 Perhaps the fundamental problem is treating nearly-identical linestrings
 as distinct edges.  Would it be possible to specify a distance tolerance,
 and raise an error if lines contain distinct sections which are closer
 than the tolerance?
-- 
Ticket URL: <https://trac.osgeo.org/postgis/ticket/5782#comment:20>
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