On Thu, Feb 26, 2009 at 10:21 AM, Peter Miller <[email protected]>wrote:
> I do think we need to spend a bit more time bottoming this out at this > stage before coding lots of interchanges. As we are aware the professional > community has also looked at these same issues and we can learn from them > and borrow from them as appropriate. > > With railways the decision seems to be to have a way per track and then use > relations to bind these together for some rendering styles. This same > approach can be used for dual carriageways and complex junctions, even > though no one has actually done such a rendering to my knowledge. > Ah, that's a nice method - I hadn't considered that option. It fits nicely with how bridges are beginning to be mapped with relations too. (though I haven't seen how renderers use this information yet). I'm also going to have to use the relation method for a few trams near me, as the roads are set up so that one side of the road is tram-only (railway=tram, oneway=yes), but the other side is also open to road traffic (highway=unclassified, tram=yes, oneway=yes), sometimes buses and taxis only (highway=unclassified, tram=yes, oneway=yes, bus=yes, taxi=yes, motorcar=no). This looks a complete mess in renderers at the moment (see http://www.openstreetmap.org/?lat=53.478996&lon=-2.241334&zoom=18&layers=B000FTF ). > Knowing what I do about train enthusiasts and public transport enthusiasts > I think we are going to end up with every set of tracks and points in the > entire world in OSM! We might start with a single way through a station and > ignore the fact that there are three platforms and six or more actual sets > of tracks, but the coding will get more and more detailed as more fanatical > people get hold of it! > Indeed - I've started to do a few stations near me. One of the unsolved problems (to my mind), is how to add platforms numbers. ref=* has been suggested, but most island platforms usually have a different number for each side of the platform (sometimes even splitting the sides up as 1a, 1b, etc). See discussion here: http://wiki.openstreetmap.org/wiki/Talk:Proposed_features/unified_stoparea#Sheffield -- Frankie Roberto Experience Designer, Rattle 0114 2706977 http://www.rattlecentral.com Sent from: Sheffield Sheffield United Kingdom.
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