[OSM-talk] Crossings of a road

[Nic Roets]

My vote is for the "bogus paths". They are in fact not bogus. If you were
walking along the road and decided to use the subway, were would you leave
the road ?

Rather than "test"ing out a few ideas on a proprietary routing engine, look
at proposals like this one :
http://wiki.openstreetmap.org/wiki/Relations/Proposed/Destination_Signs

On Fri, Jun 12, 2009 at 3:44 PM, Ed Avis <eda at waniasset.com> wrote:

> Here the major road is a dual carriageway with a fence in the middle, so
> pedestrians cannot cross:
>
>
> http://www.openstreetmap.org/?lat=51.490971&lon=-0.234075&zoom=18&layers=B000FTF
>
> There are subways which I have mapped as level=-1 paths crossing the road.
>  But
> then this path is unconnected to anything else on the map.  I want to
> express
> that you can walk along one side of the road, then use the subway to get to
> the
> other side.
>
> To do that I could make the subway have junction nodes with the two
> carriageways
> as it crosses them - but that's not quite right because it doesn't
> physically
> cross the road, it goes underneath.  Or I could even put it just between
> the two
> carriageways like a rung in a ladder, but that implies that to use the
> subway
> you must walk to the middle of the road to reach it.  Or I could add in
> somewhat
> bogus paths from each subway entrance back to the main road.
>
> I am concerned with providing useful data to routing program.  Are there
> some
> I can test with to see what is expected?  Cloudmade Maps provides
> directions but
> its data is not frequently updated.
>
> --
> Ed Avis <eda at waniasset.com>
>
>
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