[postgis-devel] [PostGIS] #1571: ST_ChangeEdgeGeom lets you break topology

PostGIS trac at osgeo.org
Thu Feb 16 06:35:18 PST 2012

#1571: ST_ChangeEdgeGeom lets you break topology
 Reporter:  strk      |       Owner:  strk         
     Type:  defect    |      Status:  new          
 Priority:  medium    |   Milestone:  PostGIS 2.0.0
Component:  topology  |     Version:  trunk        
 Keywords:            |  

Comment(by strk):

 I'm thinking that we could add an invariant making sure that the EdgeStar
 of each node of the edge endpoints looks the same (ie: same edges going
 into and output of the node, in same order). The new GetNodeEdges function
 committed in r9219 would be handy for this.

 The consequence of this would be you can't change order and you can't
 change face.
 It would remain the possibility to include or exclude isolated nodes and
 edges from one face.

Ticket URL: <http://trac.osgeo.org/postgis/ticket/1571#comment:1>
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