On 22 Jul 2009, at 16:00, Nicholas Barnes wrote:
David Earl wrote:I was doing some bus routes for the first time recently too, and I thinkthere's a fundamental problem here: a roundabout has to be a completeloop, but the bus route may only use part of it. I ended up putting thewhole roundabout in the route relation.Which, after thinking about it, would make perfect sense - after all, the bus driver could go all the way around the roundabout twice before taking the correct road off and although it may have been a little silly, nobody could say that he went the wrong route!
I have seen many roundabouts split up so that the bridges can be added properly, so started doing it myself some time ago.
If you are a data user, you could use this algorithm:For each way that has a junction=roundabout, you find all connected ways that also have that tag and try to make a loop out of them.
Shaun
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