[Tagging] Kerbs

[Nick Bolten]

> * `mountable`: mountable for wheelchairs and vehicles (...)

While this may seem easier to tag on a first pass, it's not ideal, as it's
making a broad-brush executive decision about accessibility on behalf of
others. I'm also not sure how it's different from wheelchair=yes/no
combined with access=* tags. Describing neutral on-the-ground conditions is
better, both for accessibility and general use by all mappers/data
consumers. Examples:

- Athletic manual wheelchair users can mount moderate-height raised curbs.
- Adventurous manual wheelchair users may want to use driveways as well,
where it may not be intuitive to always map accessibility, but does make
sense for a curb interface.
- Most electric wheelchairs can't handle moderate-height raised curbs.
- Souped-up electric wheelchairs can handle even fairly high curbs.
- People with impaired stability may strongly prefer moderate-height curbs,
but don't care about the shape.
- A white cane user may want to know whether to expect a certain curb shape
for navigational purposes.
- What about `semi-mountable version 2`, curbs mountable by souped-up
electric wheelchairs but not other vehicles?

These users can all be accommodated by curb shape and height tags, and most
can be mostly-accommodated just with curb shape. This is also one of the
reasons very few wheelchair maps exist: if you state 'here's the places all
wheelchairs can go' you'll get a lot of very different complaints, both
about not having enough possible routes ('I don't care about curb ramps,
just tell me where big displacements and driveways are') and also too many
('I can't handle 8 cm displacements, and this rolled curb kept me from
making my trip').

Best,

Nick

On Sun, Jan 7, 2018 at 9:15 AM Selfish Seahorse <selfishseahorse at gmail.com>
wrote:

> On 29 December 2017 at 01:41, Warin <61sundowner at gmail.com> wrote:
> > kerb:shape=* would be better as it suggests what is to be tagged.
>
> Thus, `kerb=*` values could be replaced with:
>
> * `mountable`: mountable for wheelchairs and vehicles
> * `semi-mountable`: not mountable for wheelchairs but mountable for
> vehicles
> * `non-mountable`: neither mountable for wheelchairs nor vehicles
>
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