[Tagging] When does highway=footway become highway=pedestrian?
Minh Nguyen
minh at nguyen.cincinnati.oh.us
Wed Oct 27 22:56:19 UTC 2021
Vào lúc 17:36 2021-10-26, Clifford Snow đã viết:
> I certainly don't see anything wrong with this pedestrian way since
> there is also a routable highway=path in the middle. (highway=footway +
> footway=sidewalk would be better) It does show that there is a wide
> pedestrian way which is accurate. Without the routable path, then just a
> highway=pedestrian will block people from using it. (I've heard of one
> proprietary router that does route on areas but I'm not aware of any
> open source router that does.)
Without the path or sidewalk going through, the highway=pedestrian area
wouldn't _block_ routing per se, as long as it's connected to other
footpaths. But it would force the route to hug the edge of the
pedestrian area. (Good for finding your way out of a labyrinth, not so
good for running errands.) More likely, the route would go a different
way altogether.
Among the open-source OSM-based routers [1], OpenTripPlanner is the only
one I know of that can route through areas. Unfortunately, computing the
visibility graph is a resource-intensive process, so apparently few
deployments enable it. [2] Evan Siroky gave a talk at Connect 2020 that
discusses some additional challenges with pedestrian paths and areas,
which may be of interest. [3]
Vào lúc 07:00 2021-10-26, nathan case đã viết:
> I’m wondering at what point, if at all, a highway=footway becomes
> highway=pedestrian (i.e., a pedestrian area)?
This question reminds me of one downside of mapping sidewalks and
crosswalks as ways: without some form of generalization, a pedestrian
plaza is almost guaranteed to end shortly before a road intersection, at
an intersection with a footway=sidewalk and a footway=crossing. In a
typical style that renders pedestrian plazas as prominently as roads,
the gap would look like a bug. On the other hand, the pedestrian plaza
at [4] ends in a pedestrian scramble, so connecting to the
highway=pedestrian way to the road network would be messy. It isn't a
major problem in my opinion, but it is awkward.
[1] https://github.com/osmlab/osm-planning/issues/17#issuecomment-390387196
[2] https://osmus.slack.com/archives/CDDASU2KX/p1602705461029900
[3] https://youtu.be/NRO6cPs-Pz4?t=113
[4] <https://osm.org/go/TZMjZDW76?m=>
--
minh at nguyen.cincinnati.oh.us
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