[Tagging] Tagging proposal On Wheels app 4 - Elevators wheelchair users

[Sebastian Felix Zappe]

Hey Robin,

If the elevator has its own node/way (which is the way it should be), 
you can already use:

- https://wiki.openstreetmap.org/wiki/Key:door:width
- https://wiki.openstreetmap.org/wiki/Key:width
- https://wiki.openstreetmap.org/wiki/Key:depth
- https://wiki.openstreetmap.org/wiki/Key:est_width
- https://wiki.openstreetmap.org/wiki/Key:entrance (for elevators that 
_are_ entrances)

In my opinion it's not a good idea to add these attributes to other 
objects than the elevator itself, as this kind of "extrinsic" data tends 
to gets out of sync with reality and is difficult to maintain. So if the 
elevator itself is missing, first add the elevator, then add the 
attributes mentioned above.

Here is an example of tagging of this sort: 
https://www.openstreetmap.org/node/1979754258

Could you explain what you mean exactly by "elevator_button:wheelchair"? 
In A11yJSON, we have properties that define the min/max reachable grip 
height you need to control an elevator, as there often is a duplicated 
control panel at a lower height. Is this what you mean? In this case, 
I'd try to survey these measurements, as they are more objective than 
assuming what a wheelchair user can or can't do.

All the best,

Sebastian

-- 
Sebastian Felix Zappe (he/him)
CTO
SOZIALHELDEN e.V., Berlin, Germany
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