[postgis-tickets] [PostGIS] #3838: topology.toTopoGeom fails with ERROR: XX000: SQL/MM Spatial exception - geometry crosses, when using tolerance 10 meter

[PostGIS]

#3838: topology.toTopoGeom fails with ERROR:  XX000: SQL/MM Spatial exception -
geometry crosses,  when using tolerance 10 meter
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  Reporter:  laopsahl    |      Owner:  strk
      Type:  defect      |     Status:  assigned
  Priority:  medium      |  Milestone:  PostGIS 2.3.4
 Component:  topology    |    Version:  2.3.x
Resolution:              |   Keywords:  totopogeom, ERROR:  XX000: SQL/MM
                         |  Spatial exception - geometry crosses
-------------------------+-------------------------------------------------
Changes (by strk):

 * cc: aperi (added)


Comment:

 See the damage made by snapper:

 [[Image(brokensnap.png)]]

 It may help to rewrite the snapping algorithm, maybe porting portions of
 https://git.osgeo.org/gogs/rttopo/librttopo/src/master/src/rtt_tpsnap.c

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Ticket URL: <https://trac.osgeo.org/postgis/ticket/3838#comment:7>
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