[OSM-talk] Crossings of a road
Ed Avis
eda at waniasset.com
Fri Jun 12 14:44:06 BST 2009
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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