[pgrouting-users] Splitting a network to create intersections

[Greg Allensworth]

A few weeks ago, Steve Mather posted, and one of his questions was about 
splitting up a trail network so as to create intersections, but without 
splitting unnecessarily.

http://pgrouting-users.974093.n3.nabble.com/pgrouting-users-A-vs-Dijkstra-and-the-nature-of-the-A-implementation-td4025099.html

The reply was basically "it's not that hard" which is good to hear, 
though I'm still trying to wrap my head around how exactly I would do 
this. Any explanation of the logic would be helpful there.


This fellow at StackExchange posted some code, but but he says that it 
has problems that again I don't quite follow.

http://gis.stackexchange.com/questions/34687/how-to-split-osm-roads-into-individual-segments-at-intersections

Any comments on his approach, and what would be going wrong with it also 
creating the unsplit original segments?


-- 
Greg Allensworth, Web GIS Developer
BS  A+  Network+  Security+  Linux+  Server+
GreenInfo Network - Information and Mapping in the Public Interest
564 Market Street, Suite 510  San Francisco CA 94104
PH: 415-979-0343 x302  FX: 415-979-0371    email: gregor at greeninfo.org
Web: www.GreenInfo.org     www.MapsPortal.org

Subscribe to MapLines, our e-newsletter, at www.GreenInfo.org