I agree with you, ofc. The reason for using child relations was because so many bus routes share the same roads. I'm starting to think, maybe another level of abstraction is needed. A totally separate set of relations.
What we have now: 1 route relation for each direction (even though, even that is being disputed), containing all segments and all stops where this bus stops 1 relation grouping these sets of route relations. Maybe this one should get another name. PTLine (public transportation line) In order to be able to maintain all this data, maybe we could have the child relations as 'routepart' and 'protoroute' relations to combine them. Then we (I) could write some software to convert them to the actual route relations that the routers/map drawing SW can work with. Then if a change is needed, the editor adapts the protoroute and/or the segments and runs the conversion tool. Jo 2010/11/13 Renaud MICHEL <r.h.michel+...@gmail.com<r.h.michel%2b...@gmail.com> > > Le samedi 13 novembre 2010 à 15:37, Jo a écrit : > > Now I'll go and eradicate the child relations... after that, not sure if > > I'll touch any public transport data anymore, apart from a bus stop here > > or there. > > Why? > It is much more easier to have the common part of alternative bus routes in > a single relation shared by all the alternatives. > > In Liège I have mapped bus route 10, there are 3 variation of this bus > route: > 10 Fléron http://www.openstreetmap.org/browse/relation/1148168 > 10 Mangée http://www.openstreetmap.org/browse/relation/1148170 > 10 Romsée http://www.openstreetmap.org/browse/relation/1148169 > Up to Fléron, those three are identical, so that common part is in relation > http://www.openstreetmap.org/browse/relation/1148167 > which is shared by the three, further, 10 Magnée and Romsée share a small > part which I have put in relation > http://www.openstreetmap.org/browse/relation/1148166 > > It is much easier to have it that way, if a bus stop change in the common > part it must only be changed in one relation (and maybe others if the same > stop is part of different routes, like 38b). > > I intend to do the same for other bus routes that I map (I already have a > work in progress for 33 which also have alternatives (33 Vaux, 33 Trooz). > > -- > Renaud Michel > > _______________________________________________ > Talk-be mailing list > Talk-be@openstreetmap.org > http://lists.openstreetmap.org/listinfo/talk-be >
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