HI Phil, hi Colin, in the case of 4a/4b etc I would put in different stop points. If 4a always serves one route, then 4a would be added to the route relation. Maybe if 4a / 5a / 6a can all serve the same route, then I don't know what the solution is.... Maybe you just add a new stop point somewhere, and add a note? Or put 4a/5a/6a into a relation, and add the relation? (That would be against the spec at the moment I think... but could be a solution.)
Colin: Actually, in the case you mentioned (short/long trains), I guess there could also be several stop points. I think that's not a problem. It's just you would only add one of those to the route relation. For the several stop points, ideally there would be a note, saying "front of train, 4 carriages" or "front of train, 8 carriages", or maybe an additional tag of some kind. To come back to the original question: If an association between a stop point and platform exists (as it does on the underground), is there a way of indicating this through tagging? What are your views? There are a few possibilities, e.g. both the stop point and the platform could share the same name (kinda fragile though). They could be ordered in the relation so that the stopping_position comes first, followed by the platform (this would be a new feature, but e.g. a tag could be added to the route relation where this ordering has taken place). Also, the roles in the route are stop/platform, but also suggest stop:n / platform:n. It's not to order them, and it doesn't look like this is to associate stop/platform, but it could be used. What do you think? Bjoern On 10 May 2017 at 18:57, Philip Barnes <p...@trigpoint.me.uk> wrote: > On Wed, 2017-05-10 at 18:42 +0100, Bjoern Hassler wrote: > > But yes - what do you do if a rain route goes through a station, where the > rails temporarily split into several tracks? Where is the stop position for > that route? Clearly in that case stop_positions on the route cannot be > associated with platforms in the station, and full routing is not possible. > > > However, I would say that each platform should still have a stop_position > (on the rails) - even though those stop_positions might not be in route > relations... > > And different stop positions for each direction? In larger stations > platforms serve trains in different directions. And not forgetting > platforms can be split, Shrewsbury uses 4a/4b/7a/7b and its quite possible > to have trains in 4a/4b at the same time that will leave in different > directions. That is having arrived as a single train into platform 4.... > > Phil (trigpoint) > > > _______________________________________________ > Tagging mailing list > Tagging@openstreetmap.org > https://lists.openstreetmap.org/listinfo/tagging > >
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