Mark Burton wrote:
Splitting roundabouts into segments is very common in the UK because of route relations. i.e. a bus route uses part of a roundabout and so the roundabout is split into segments so that only a portion of the roundabout is part of the bus route.
Not to mention motorway-junction roundabouts which have to be split so that part of them can be flagged "bridge=yes" & "layer = 1".
It's incredible what crap people are happy to put into the OSM database. I get the impression that most contributors don't give a toss about the map being routable or not.
True, but unless they've got a Garmin, and use mkgmap, they're unlikely to have tried using the data for routing. There isn't a "mktomtommap" yet, is there? The more people start to wake up to the advantages of up-to-date free maps for their in-car GPS units, the better the data will become. Mind you - it's going to take ages to get universally good. Steve