On Thu, 2 Apr 2020 10:53:57 -0400 Kevin Kenny <kevin.b.ke...@gmail.com> wrote:
> On Thu, Apr 2, 2020 at 5:12 AM Volker Schmidt <vosc...@gmail.com> > wrote: > > > > If a highway is mtb:scale=2 it is definitely not a cycleway. It is > > a highway=path with mtb:scale=2 If this were to encounter a > > "cycleway" with mtb:scale=2 , I would consider this an error and > > retag it as highway=path without hesitation. > > > > I agree, that this is not explicitly stated in the bicycle wiki > > page, and should be added there, but I would assume that this is > > the common understanding. Anything else would cause major problems > > with the huge stock of existing highway=cycleway in OSM that have > > no mtb:scale tag. Routers for non-MTB bicycles would all need to > > change and evaluate the mtb:scale tag. > > > > There is already a similar problem with the OpenCycleMap rendering > > in the sense that it renders a dedicated cycle path in the same way > > as a path with bicycle=yes. This has the effect that many MTB > > friends have added bicycle=yes to "normal" hiking paths to make > > them appear as MTB friendly on the map, but also with the problem > > that when I look at that map I wrongly see a cycle paths where I > > would never be able to pass with my loaded touring bike. > > > > Please keep paths that can only be used by MTB clearly different > > from cycleways that can be used non-MTB bicycles. > > A key issue is that mtb:scale can't be the only indication. Otherwise, > we're falling into a trap - which has been a common trap in the past. > It's a trolltag https://wiki.openstreetmap.org/wiki/Trolltag - a > second tag that negates or massively changes the meaning of another > tag. "This isn't what you were expecting of a highway=cycleway: it's a > wilderness trail for highly skilled and adventurous MTB riders!" But "highway=path, bicycle=yes" has the same issue. From a legal standpoint, this is a "highway=path, foot=yes, bicycle=yes, horse=yes, ski=yes, snowmobile=yes". From a practical standpoint, however, it's "ski=yes, snowmobile=yes, foot=difficult, bicycle=carry, horse=nope". https://help.openstreetmap.org/upfiles/RoughTrail.jpg There isn't any top-level tag to indicate that trees have fallen across the trail creating a waist-high barrier, and that it's only easy to traverse once there's three feet of snow on the ground. -- Mark _______________________________________________ Tagging mailing list Tagging@openstreetmap.org https://lists.openstreetmap.org/listinfo/tagging
