Maybe we should have roundabouts as a relation, containing all the road segments which should produce a closed polygon. Then we put the centre obstacle stuff on the relation. That would be closer to the OSM model of having one OSM object for one real-world object. Then a magic roundabout could be modelled as a nested object with the individual roundabouts as members.
//colin On 2015-11-04 11:34, Gerd Petermann wrote: > I just notice that center_barrier or center_obstacle would > be US spelling, so it has to be centre_* > > In other words, we should probably not use a key that is > different in UK / US spelling, else we'll see many wrong > entries. > > Another problem that I see here is that we allow to map > a roundabout as multiple ways with the junction=roundabout > tag. What would it mean if they don't all show the same > values for the obstacle? > > Gerd > > ________________________________________ > Von: Florian Lohoff <f...@zz.de> > Gesendet: Mittwoch, 4. November 2015 11:03 > An: Tag discussion, strategy and related tools > Betreff: Re: [Tagging] roundabouts without obstacles in the middle > > On Tue, Nov 03, 2015 at 05:35:53PM +0100, Colin Smale wrote: > >> Hi Gerd, >> >> Personally from a navigation point of view I expect roundabouts and >> mini-roundabouts to be treated the same, i.e. "take the first exit at > > They are currently not - Most navigational software basically does > not know about mini-roundabouts because they are difficult to > preprocess (One needs to add ways). > > I'd like mini_roundabouts to disappear and be replaced with > an additional tag on a roundabout which tells about the existance > of an obstacle in the middle which makes it one less special case. > > junction=roundabout > center_obstacle=clear/yes/no/drivable > roundabout=flat/obstacle > > Whatever ... So processing a roundabout is ALWAYS the same from the > navigational perspective and changes only from route selection when > your vehicle is getting longer. > > Flo > -- > Florian Lohoff f...@zz.de > We need to self-defend - GnuPG/PGP enable your email today! > > _______________________________________________ > Tagging mailing list > Tagging@openstreetmap.org > https://lists.openstreetmap.org/listinfo/tagging
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