[Tagging] Sidewalks vs Footways

john at jfeldredge.com john at jfeldredge.com
Thu Mar 17 19:58:30 GMT 2011

You also have the fact that it may be physically possible to cross from a sidewalk on one side of the street to the other, due to a lack of barriers, and yet be inadvisable to do so at certain points (in the middle of a blind curve, for instance, or on a road that has heavy traffic and lacks pedestrian crossing-signals).  In some cases, crossing may be possible at some times of day but not others.  Hopefully, there would be a way to tag this information for use by routers.

-------Original Email-------
Subject :Re: [Tagging] Sidewalks vs Footways
From  :mailto:dieterdreist at gmail.com
Date  :Thu Mar 17 14:48:22 America/Chicago 2011

The point of having a separate way is to indicate that it is not
possible to cross from one to the other (if you see the sidewalk like
a lane), if you take the kerb as an barrier, mapping them separate
might have a certain sense (although a kerb is not a serious obstacle
for the biggest user group of the sidewalk:t pedestrians).

I wrote a proposal for the area-relation which tries to combine 2
aspects: the area aspect of a road, and the possibility to change from
one way to another without connecting node (the router would also
consider intersections of another "lane"/highway as valid).

We would draw the outer limits of the footway and interpolate the area
from there to the center or to the other side of the road. There would
not be mapped connections from this way to the centerline or to the
other side, but routers could understand that you can cross.

For the barriers there is also tags to map them (be it a wall, grass,
a kerb, or whatever).


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John F. Eldredge -- john at jfeldredge.com
"Reserve your right to think, for even to think wrongly is better than not to think at all." -- Hypatia of Alexandria

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