[postgis-tickets] [PostGIS] #4694: NewEdgesSplit does not snap to edge

[PostGIS]

#4694: NewEdgesSplit does not snap to edge
----------------------+-------------------
 Reporter:  tomass    |      Owner:  strk
     Type:  defect    |     Status:  new
 Priority:  medium    |  Milestone:
Component:  topology  |    Version:  3.0.x
 Keywords:            |
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 ST_NewEdgesSplit is unable to split an edge with an error "SQL/MM Spatial
 exception - point not on edge".

 Script to reproduce an error is attached. It drops and then creates a new
 topology to make sure we have a clean environment. Inserts new edge. Then
 a call to ST_Distance shows that a distance to the node which will be used
 as a split point for an edge is "9.946529457016767e-10" away. Then a call
 to ST_NewEdgesSplit fails with an error:

 {{{
 ERROR:  SQL/MM Spatial exception - point not on edge
 }}}

 **NOTE:** If I do a workaround and modify an edge adding a new point to
 the edges geometry - then call to ST_NewEdgesSplit is successful.

 Tested on Centos8.1, PostgreSQL 12.1, Postgis3.0.1 (topology 3.0.1),
 GEOS3.7.2.

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Ticket URL: <https://trac.osgeo.org/postgis/ticket/4694>
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