[Accessibility] How to map parts of tactile paving and other feature?

[THUROW, ANNETTE]

Hello list,
hello Annemieke!

Annemieke:
> I marked the nodes of crossings with traffic signals like this:
> 
> highway = traffic_signals

Not correct, because highway=traffic_signals ist he node where the street is crossing the street.

The pedestrian crossing is crossing=traffic_signals.

> crossing = island (if there is an island in the middle of the road)

Islands are best represented by splitting up the tracks of the road.
Crossing=island does not help to prevent cars from trying to turn there,
and the curbs can not take more attributes...

So a pedestrian crossing with a traffic island is mapped as two pedestrian crossings...
Closer to reality.

> traffic_signals:sound = yes

Good
> tactile_paving = yes

It is not clear, what is meant by adding tactile_paving to a single node in the middle of the crossing.
There are many pedestrian crossings, that can be with or without tactile paving on one or none or both sides.
Have a node for every single spot on the ground with or without tactile paving where the curb is.
That is what is needed.

Also tactile_paving can be on the pedestrian crossing itself, if there is a guiding line over the street (seldom!).
 
> And other crossings, with only tactile paving, but no other markings
> like this:
> 
> highway = crossing
> crossing = unmarked
What is this?

> tactile_paving = yes
On node? On way? See above.
 
> I will start adding foot-ways right away... Grave (NL) is not such a
> big town, and I know it well enough to do most of them from memory and
> field-check the rest.

Tactile paving needs very correct coordinates - There is no way to add it from your memory.
The navigation software for the blind will even try to reach more GPS accuracy with DGPS sooner or later,
So the accuracy is planned to come to what a blind person can detect with a white cane.

Any inaccurate mapping will confuse the blind people - a good FIXME="track for tactile_paving" is more welcome than a 9m offsite tactile_paving=yes...

Best regards
Lulu-Ann