After looking into it further, I can only agree. I added the missing members back (one way and a few junctions that were probably overlooked by previous mappers), but every roundabout and double road "cuts off" the automatic ordering by JOSM. It seems to consider that a loop breaks the relation order entirely and doesn't attempt to follow it any further.
I still pushed the changes since they contain a few added members, but I think the N30 (and other N roads) will have to stay unsorted, unless JOSM's sorting mechanism starts taking geographical proximity into account instead of strictly checking the end nodes. Regards, Nathan Monfils On Monday, September 3, 2018 8:09:28 PM CEST Jo wrote: > The "problem" with N roads is that they are not linear features, they > split, recombine, have dangling dead ends, roundabouts and so on. > > Yes, you can group some of the elements, but the next time you sort, other > groups may be formed, so it's arbitrary. > > Jo > > Op ma 3 sep. 2018 om 20:03 schreef André Pirard <a.pirard.pa...@gmail.com>: > > On 2018-09-03 00:24, Jo wrote: > > > > for route=road relations order doesn't matter much. It's impossible to > > sort them according to any meaningful criterion. > > > > A meaningful criterion to sort a route is so that two adjacent ways of it > > share one same end node. > > In other words, that the route is ordered the way you travel it without > > interruptions. > > That's what the "sort" buttons of JOSM do. > > And, beside finding a segment more easily, the schema of the route made by > > JOSM shows the gaps (missing pieces). > > And in particular it will show if the road is circular. > > For example, if you sort the N30, you will see a gap between Boulevard de > > Fraipont and Avenue de la Libération. > > And 16 other gaps in total. > > > > Last time I spoke of routes with a Potlatch user, he told me he couldn't > > sort routes. > > I don't know about ID and that's quite a time ago. > > > > The N30 should be sorted and corrected. > > I will let Nathan do it if he's busy with it. > > > > Amitiés, > > > > André. > > > > Polyglot > > > > Op zo 2 sep. 2018 om 22:54 schreef Nathan Monfils <nathanmonf...@gmail.com > > > >> Hello! > >> > >> I was doing some editing on the N30 near Liège, when I noticed that its > >> relation was completely unordered, with ways near the city center being > >> next > >> to ways much further south (see relation `124374`). > >> > >> The wiki defines a relation as an *ordered list*, yet only mentions order > >> for > >> bus lines. Is there a need for the road relations to be ordered > >> correctly? > >> > >> Regards, > >> > >> Nathan Monfils > > > > _______________________________________________ > > Talk-be mailing list > > Talk-be@openstreetmap.org > > https://lists.openstreetmap.org/listinfo/talk-be _______________________________________________ Talk-be mailing list Talk-be@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk-be
