[Tagging] barrier=kerb + kerb=lowered

[Volker Schmidt]

barrier=kerb was/is mainly a linear feature.
kerb=* is mainly used as node, most likely originally as attribute to
pedestrian crossings tagged as nodes on the crossed highway. With the more
detailed mapping of crossings it has been used also as node with only
kerb=* at the position where the kerb crossing footway hits the kerb. Some
mappers then added barrier=kerb ro these nodes, which is in my view
redundant, but not wrong.


On Mon, 7 Jun 2021, 09:42 Mateusz Konieczny via Tagging, <
tagging at openstreetmap.org> wrote:

>
>
>
> Jun 7, 2021, 04:50 by jmapb at gmx.com:
>
> Offhand, it seems like textbook troll tagging to me, negating a tag with
> its own subtag.
>
> Not really, kerb=lowered and kerb=flush is also for cases where
> kerb is actually there.
>
> barrier=kerb for many is not a barrier, but there is also barrier=bollard
> - so anyone processing this tags need to check also its value anyway.
>
> If the kerb has been lowered so that the footway is
> level with roadway, then not only is there no kerb but there's no
> barrier at all. Exactly the opposite.
>
> I would say that for
> https://commons.wikimedia.org/wiki/File:Flush_kerb_IMG_20200927_134537.jpg
> there is still kerb.
>
> Yes, typically it is not a barrier (can be still problematic for the
> blind),
> but typically barrier=bollard is also not a barrier (only for wider
> vehicles).
>
> Currently the wiki doesn't indicate that kerb=lowered and other kerb=*
> values are intended to be subtags of barrier=kerb. But it doesn't say
> they shouldn't be, either.
>
> https://wiki.openstreetmap.org/wiki/Tag:barrier%3Dkerb
> https://wiki.openstreetmap.org/wiki/Key:kerb
>
> I think that using them together should be documented.
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