Hi, Is 'unknown' really such an unusual and undesirable as an access tag? I thought it was long-established, if not especially common. If the issue is a lack of Wiki documentation that is easily solved.
I think that highway=footway foot=unknown adds a useful level of nuance. For example a routing engine could choose to avoid such routes where it would route over a footway by default. Of couse we could produce this result by tagging foot=no, but if we don't know that pedestrians actually aren't allowed that would be incorrectly tagging for the router. foot=unknown could be considered an implicit fixme in the same way as highway=road is, but also have teh benefit of being useable directly by data consumers (if they chose to use it) unlike the free-form text contained in notes and fixmes. More generally, wherever an absence of a particular tag is taken to imply something is or isn't present then a tag of something=unknown does have a valid and worthwhile meaning distinct from no tag at all. . Adam On 5 February 2018 at 16:46, OSMDoudou < 19b350d2-b1b3-4edb-ad96-288ea1238...@gmx.com> wrote: > I'd rather use fixme and note tags instead of encoding uncodified > information in well-established tags. > > The wiki page [1] explains a bit the difference: "The fixme key allows > contributors to mark objects and places that need further attention. These > can be in the form of a "note to self" or request for additional mapping > resources. Its distinction from note=* is that fixme is only to express > that the mapper thinks there is an error, while note might be information > to other mappers." > > If it's reasonable to think tagging can be improved (e.g. initial tagging > was a bit rushed and better tagging is expected based on site survey or > imagery), than a fixme note looks suitable. > > In the case you describe ("nothing suggesting that further survey will > reveal what the legal situation is"), a note looks suitable to document > there was a site survey and explain why "it was obvious that it was not > obvious" (that is to say: explaining the elements causing your perplexity > conveys much richer information than tagging "unknown"). > > And you could also start a discussion on the mailing list and link to it > from the note, so other mappers are aware of the discussion and can > contribute. > > [1] https://wiki.openstreetmap.org/wiki/Key:fixme > > > _______________________________________________ > Tagging mailing list > Tagging@openstreetmap.org > https://lists.openstreetmap.org/listinfo/tagging >
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