On 02/04/2011 12:09 PM, Richard Mann wrote:
I've been attempting to order a relation using P2 (I don't recommend
trying it yourself yet - the process needs streamlining). I managed to
sort the nodes in a two-directions-with-loops relation:
http://www.openstreetmap.org/browse/relation/85299
and got a reasonable line-diagram, once I'd added forward_stop and
backward_stop:
if I may just comment on the relation: I would start and end at the
terminus (which seems to be The Oval) - that way the relation represents
the longest way a passenger can travel (assuming services don't normally
end at some point in the loop), which I think is most intuitive. I would
also use "stop" rather than "forward_stop" and "backward_stop" for the
roles since the outward and return directions of a spoon route are
somewhat hard to tell apart. (Unless one stop in the loop is formally
designated as the terminus where services routinely end.)
http://78.46.81.38/api/sketch-route?85299
I think this confirms that line diagrams will work fine with stops
beside the way.
In fact - as I understand it, the tool ignores ways completely and just
examines stop members and their order. As far as I know, retrieving the
stops of a line on openbusmap works the same way.
Michael
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