[Tagging] Put the name in sidewalks and cycleways

[SelfishSeahorse]

Hi Tobias

Yes, sidewalk mapped as ways are problematical for routeing. In order
to not create islands in (residential) areas without marked crossings,
one has to map unmarked crossings. If there are lowered kerbs or if a
sidewalk is just interrupted by a perpendicular street, it seems okay
to map unmarked crossings (see for example [^1]). But in absence of
lowered kerbs and if the sidewalk doesn't continue (for example here
[^2]), mapping an unmarked crossing or connecting the sidewalk with
the road differently just seems arbitrary.

[^1]: <https://www.openstreetmap.org/#map=19/46.95251/7.42688>
[^2]: <https://www.openstreetmap.org/way/568668132>

However, sidewalks tagged as property on the road don't seem to be
unproblematical too, especially at intersections. For example, look at
this crossroads [^3]: how should a router know that a pedestrian has
to cross Engehaldenstrasse here [^4] when guiding her or him along
Schützenmattstrasse? Or how would you map a crossroads with multiple
carriageways (like here [^5]) with sidewalks only tagged as property
on the roads?

[^3]: <https://www.openstreetmap.org/#map=19/46.95335/7.43943>
[^4]: <https://www.openstreetmap.org/node/2584729888>

Perhaps, a solution would be to map a sidewalk and the road it belongs
to as areas (area:highway=*). That way, the sidewalk and the road were
connected and the connecting line could even be mapped with a kerb
way.

Regards

Markus

On Sun, 5 Aug 2018 at 17:44, Tobias Knerr <osm at tobias-knerr.de> wrote:
>
> On 05.08.2018 17:16, yo paseopor wrote:
> > So what is the correct way to map it: with name? or without name?
>
> Adding name tags to separately mapped sidewalks is an attempt to fix
> just one of the symptoms of a deeper problem: The lack of a
> machine-readable link between the sidewalk way and the road it belongs to.
>
> This fundamental shortcoming of the current approach for
> sidewalk-as-a-way mapping also causes several other issues, though,
> which aren't as easily compensated for. There's nothing wrong with
> copying the name per se, but needing to do so is a red flag.
>
> So my recommendation is to stick with sidewalk tags. Alternatively,
> create a relation between each highway way and the one or two sidewalk
> ways belonging to it. (You'll probably balk at that, but something along
> those lines would be needed to actually _solve_ the inherent flaws of
> the sidewalk-as-a-way approach.)
>
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