[Tagging] Formally informal sidewalks
nbolten at gmail.com
Sat Jul 15 07:18:19 UTC 2017
Those are all very good points. This one is particularly interesting:
>An example of this issue is where a road with no sidewalks meets another
road with sidewalks, but does not cross it (and is not in an urban environ,
so there is no real paint to show a crossing=zebra) . Do you add a
crossing=unmarked that goes from the sidewalk to the node of the road’s T
junction? People on the sidewalk far side of the T junction will expect to
be able to cross the street there and continue on the road.
I don't think we really have adequate tags to describe that situation, so
everyone makes due by either doing what you suggest (a half-crossing) or
connecting footways/sidewalks directly to roads. Neither makes perfect
semantic sense: it's not really a road crossing and it's also not really a
sidewalk, it's just a change of path that a pedestrian would realistically
need to make. It should probably use an entirely new tag for a pedestrian
transition of some sort (not unlike a *_link for roads), but that would of
course need to be hashed out in a separate proposal. In the meantime, I
also tend to use highway=footway, footway=crossing, crossing=unmarked to
connect an ending sidewalk to the road.
On Fri, Jul 14, 2017 at 11:46 PM Andre Engels <andreengels at gmail.com> wrote:
> My strategy in this kind of case is to add those driveways and virtual
> crossings that are useful for routing purposes. So if there is a
> junction, if there is a driveway opposite it, I will add that driveway
> (or maybe just the part of the driveway upto the sidewalk), if there
> is none, but people can cross there (in the case you describe: If
> there is an interruption in the hedge), I add a footway from the
> sidewalk to the junction, if neither is the case, I add the driveway
> or crossing point that is closest to the junction (on both sides if
> On Fri, Jul 14, 2017 at 3:48 PM, Marc Gemis <marc.gemis at gmail.com> wrote:
> > Another typical case
> > - no explicitly marked crossings
> > - sidewalk parallel to road
> > - kerb separating sidewalk from road
> > - hedge, interrupted for each driveway and at the junctions, placed on
> > sidewalk, parallel with road.
> > --> need to add all driveways ?
> > --> need to draw virtual crossings at junctions ?
> > m
> > On Fri, Jul 14, 2017 at 3:41 PM, Mike N <niceman at att.net> wrote:
> >> On 7/14/2017 8:14 AM, Marc Gemis wrote:
> >>>> but merge sidewalk with the road where the is no space/barier between
> >>>> them.
> >>> and that's were the discussion starts. When I asked when one has to
> >>> draw a separate sidewalk a few weeks ago on this mailing list someone
> >>> answered: as soon as there is a kerb.
> >> Similarly, I have been combining sidewalks with roads where there is
> >> separation. But when there is a small grass separation from the
> >> they are drawn separately. For those cases, it is usually allowed to
> >> the grassy separation and the road to get to the opposite sidewalk.
> >> Throwing out the R word here - what about a relation that defines
> >> disconnected ways could be walked to or across from any point on a
> >> way? That would also include the road since there would be no barrier.
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> André Engels, andreengels at gmail.com
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