"impossible" only due to missing tools to be able to do the job and the time it take do it "by hand" try to order this one http://www.openstreetmap.org/relation/1744381 I spent a little time sorting these members, but it's a waste, it's deteriorating faster than it's getting better.
Le 03. 05. 18 à 18:49, Colin Smale a écrit : > Why does a loop make it impossible to sort the ways? It implies that a > section of the route is present twice in the relation, but there is > surely no distinction between the first traversal of a way and the > second traversal? > > > On 2018-05-03 18:42, Volker Schmidt wrote: > >> I will try to explain this in a more systematic way: >> >> Routes belong to either of two categories: >> (A) Those whose members can be sorted into a single ordered sequence >> (B) Those that cannot be sorted into a single ordered sequence of members >> Sorting makes only sense for category (A) >> Routes of type (B) can be subdivided into routes of type (A), each of >> which can be sorted, but the overall route can not be sorted. >> >> Routes are of type (A) if >> (1) the path from begin to end is identical to the reverse path with >> all members traversed in the reverse order and in the opposite direction >> or >> (2) all members have the role forward >> or >> (3) all members have the role backward >> >> Any route >> (1) that has more than two ends >> or >> (2) that contains any loop (except the case that the entire route is a >> single loop) >> or >> (3) that contains any element with role forword or role backward >> (except the cases of all-forward or all-backward) >> or >> (4) that contains node or area elements >> is of type B >> >> I am not sure if I have taken care of all cases - please complete as >> necessary >> >> >> >> _______________________________________________ >> Tagging mailing list >> [email protected] <mailto:[email protected]> >> https://lists.openstreetmap.org/listinfo/tagging > > > _______________________________________________ > Tagging mailing list > [email protected] > https://lists.openstreetmap.org/listinfo/tagging > _______________________________________________ Tagging mailing list [email protected] https://lists.openstreetmap.org/listinfo/tagging
