On Tue, Aug 31, 2010 at 4:35 AM, Nathan Edgars II <[email protected]
<mailto:[email protected]>> wrote:
I don't know of any other feature where the direction of the way means
something *without* another tag being added. I've traced a number of
waterways from aerials and never had any idea I was supposed to set
the direction of the way equal to the direction of flow.
Just to throw something else into this discussion...
highway=steps
It doesn't (or at least, isn't documented as) have direction, but
_could_ have in the same way as rivers (direction of way is down the
steps, say).
Some other things that might have natural "flow" or "directionality":
cable cars, ski runs, power lines, pipelines, slipway, pier, military
range, racecourse, athletics track
Incidentally, direction of flow for waterway=canal doesn't work on the
summits and troughs of a locked canal, but that's probably being pedantic.
Coastline and boundaries most definitely use way direction in their
semantics.
David
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