openplans/OSMSplit — Issue #6: Trouble re-matching conflated streets with segments... new conflation rule?
Author: saxbarm
Created: 2012-01-17 23:56:47+00:00
State: open

I'm having some trouble re-matching a few street segments with conflated streets properly in PostGIS (93 out of 200,000+) at last attempt. The problem seems to occur when a conflated street overlaps itself, as with 30815 in the linked doc, originally made up of 4 segments: https://docs.google.com/document/d/1HryndSQ4EPo4lQNsOVhpm8rLi__Wq_kC-LclUzOEZcI/edit

So, I was thinking we might be able to fix the problem by instituting a rule for conflated streets--- that they can't cross themselves? Any time it would, it should begin a new segment instead. Loops would be okay (it can touch the other end, but can't extend past that point).

Does that sound reasonable to implement? Other suggestions are welcome as well. Thanks!