+1 This was exactly what I was about to comment. I'd add that things might look relatively ok in areas where the map data is pretty complete -- but it totally tanks in areas where it's not. I didn't come to think of the access-/practicability-related, which make it even more complicated.
As per the notion of "intersection nodes are quite stable in OSM". Again, might b true for intersection nodes but it's the additions of "shortcuts" that makes it especially complicated, I think. Cheers, -Jaakko ------Original Message------ From: Henning Scholland To: Tag discussion, strategy and related tools ReplyTo: Tag discussion, strategy and related tools Subject: Re: [Tagging] How to solve the problem with relation overload? Sent: Nov 30, 2012 09:31 Am 30.11.2012 15:11, schrieb Pieren: > On Fri, Nov 30, 2012 at 2:21 PM, Henning Scholland <[email protected]> wrote: >> Eg.: >> ___D___ >> / \ >> | | >> ---A---C---B---- Think about there is only -A-D-B- , where A and B are a node in such a relation. Everything is fine. Now someone adds a way A-C-B. This mapper have to do several things now: Check, if he make a way of a relation more directer as it was before. Problem1: Find all affected relation. Problem2: If he adds a footway, he can skip bus-relations, but what to do if access is unclear? Problem3: Editing the route will end in a try'n'error: Does josm "routes" correct if I add this node? Problem4: No mapper will know about to do these checks, because it was never ever a problem adding a simple way or changing highway=* or access Same if a mapper changes the access of any way. Maybe its easy in Cities, if necessary nodes are pretty close. But in rural areas it could happen that you edit/add a way somewhere and you destroy a relation which has one node 1km left of your mappnig area and the next one 5km in the right. This isn't really practicable. Henning _______________________________________________ Tagging mailing list [email protected] http://lists.openstreetmap.org/listinfo/tagging Sent from my BlackBerry® device from Digicel -- Mobile: +509-37-26 91 54, Skype/GoogleTalk: jhelleranta _______________________________________________ Tagging mailing list [email protected] http://lists.openstreetmap.org/listinfo/tagging
