[postgis-devel] [PostGIS] #785: Topology functions should be tolerance aware

[PostGIS]

#785: Topology functions should be tolerance aware
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 Reporter:  robe         |       Owner:  strk         
     Type:  enhancement  |      Status:  new          
 Priority:  medium       |   Milestone:  PostGIS 2.0.0
Component:  topology     |     Version:  trunk        
 Keywords:               |  
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Comment(by strk):

 It'll be a long way to make them all tolerance aware, so it's likely worth
 setting up a marker like you have for Z index support of postgis function
 (in the manual).

 For each function we'll need to think the actual behavior.
 For ST_NewEdgesSplit, for instance, I guess we'll want to Snap the point
 to the edge. Or, in general, always snap what comes later with what's
 already
 registered in the topology. Does it sound fine ?

 DWithin is surely good to use for the conditional part. I've started
 adding its
 use in some topology functions already, altought I havne't yet
 parametrized the
 actual distance (not worth unless the tolerance is _fully_ considered, not
 just
 on the conditional part)

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Ticket URL: <http://trac.osgeo.org/postgis/ticket/785#comment:1>
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