[postgis-tickets] [PostGIS] #2519: New function in Postgis topology : GetRelatedTopoGeom

[PostGIS]

#2519: New function in Postgis topology : GetRelatedTopoGeom
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 Reporter:  remic         |       Owner:  strk         
     Type:  defect        |      Status:  new          
 Priority:  medium        |   Milestone:  PostGIS 2.1.1
Component:  topology      |     Version:  2.0.x        
 Keywords:  Topogeometry  |  
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 This is a ticket to host a proposal of new functions for postgis_topology.
 The idea is to facilitate working with mutliple layers of Topogeometry
 which are related.

 The example use case is a (lineal) road network.
 A topogeometry layer could be the intersection points, with their own
 attributes (like type of traffic, etc.)
 Another topogeometry layer could be some roads of minor importance,
 and another topogeometry layer some road of majord importance.

 The proposed function allows to get all elements of a given topogeometry
 layer which may be impacted by a change of geometry of a given
 topogeometry elements from another layer.

 To be clear the function returns u as:
 for all x in topogeom layer X, y one topogeometry in layer Y, {u in X
 where x and y share at least one node}.

 Please attached image issued from function testing to get a clear idea.

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Ticket URL: <http://trac.osgeo.org/postgis/ticket/2519>
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