Agree more the exeption then the rule. But any action which prohibits routing for this situation should be avoided, Hugo Op 22 nov. 2012 12:48 schreef "Jo" <winfi...@gmail.com> het volgende:
> In that case you add all the ways of the roundabout to your route > relation. You'll have to admit it's rather the exception than the rule. > > Jo > > > 2012/11/22 Hugo Hölscher <hugoholsc...@gmail.com> > >> I do think there are situations were you want do a full roundabout. >> Example: want toturn left on a road, but that is prohibited. Right is >> allowed and there is a nearby roundabout. Then you will do a full-turn. >> Hugo >> Op 22 nov. 2012 10:03 schreef "Maarten Deen" <md...@xs4all.nl> het >> volgende: >> >> On 2012-11-22 09:41, Wolfgang Wienke wrote: >>> >>>> Am 22.11.2012 07:50, schrieb Maarten Deen: >>>> >>>>> On 2012-11-21 20:48, Wolfgang Wienke wrote: >>>>> >>>>>> Am 21.11.2012 18:48, schrieb Maarten Deen: >>>>>> >>>>>>> On 11/21/2012 06:45 PM, Maarten Deen wrote: >>>>>>> >>>>>>>> On 11/21/2012 06:41 PM, Wolfgang Wienke wrote: >>>>>>>> > Hi, >>>>>>>> > I'm mapping in NL near Aachen. Can someone tell me, why there is >>>>>>>> more >>>>>>>> > that ONE way in a dutch roundabaout? >>>>>>>> There isn't. A roundabout is always one way. If there are two >>>>>>>> directions >>>>>>>> it is not a roundabout but a circular road. >>>>>>>> >>>>>>>> Just after sending this I realized that I must have misread your >>>>>>> question. You mean why most roundabouts are made up of more than one >>>>>>> way. >>>>>>> >>>>>>> Initially it is because of the AND import. The AND dataset was such >>>>>>> that >>>>>>> between every junction of 3 or more roads there was a sperate way. >>>>>>> >>>>>> What means the AND dataset? >>>>>> >>>>> >>>>> AND donated their dataset in 2007 and was subsequently integraded into >>>>> OSM. >>>>> <http://wiki.openstreetmap.**org/wiki/AND_Data<http://wiki.openstreetmap.org/wiki/AND_Data> >>>>> > >>>>> >>>> I do not find there any special about roundabouts. I think, that it >>>> is important to recognize a roundabout for navys to tell the user >>>> something like "leave the rounabout at the second street". >>>> Is there no discussion in Netherlands to join the automatically >>>> generated part of a roundabout manually? >>>> >>> >>> No, because that is not necessary. >>> The AND data was structured such that at every point where there is a >>> juntion of three or more ways, a new way was created. You'll still see that >>> in lots of parts of the Netherlands: >>> <http://www.openstreetmap.org/**?lat=51.319581&lon=5.996067&** >>> zoom=18&layers=M<http://www.openstreetmap.org/?lat=51.319581&lon=5.996067&zoom=18&layers=M> >>> > >>> >>> It is not necessary that the road "Lindanusstraat" is split up in 5 >>> parts, but that is how the AND dataset came. You'll notice the AND_nosr_r >>> tags on these ways, so you can see it came from AND that way. The same with >>> roundabouts. Because every connecting road is a point where 3 ways connect, >>> it was a different way. >>> >>> Routing engines have no adverse effects from this. There is no >>> (sell-respecting) routing engine that will tell you to "continue for 100 >>> metres" a thousand times when the road is spilt up in smaller ways. So why >>> would it do that on a roundabout? >>> A roundabout is recognized by its tag: junction=roundabout. Not by its >>> physical properties (a circular one-way street). >>> >>> Now it is just convenient if you have different relations (like a bus >>>>>>> line) over the roundabout. Then you can indicate exactly which side a >>>>>>> relation takes. >>>>>>> >>>>>> Well, this is really not necessary because you drive the roundabout >>>>>> alwas in the same direction. >>>>>> In Germany we only have roundabouts made of ONE way. If you use the >>>>>> relation-editor of JOSM, than you can easily recgnize a roundabout. >>>>>> Would it not be easier, to use only ONE way in a roundabaout? >>>>>> >>>>> >>>>> I think this looks much tidier than when roundabouts are always one >>>>> way. >>>>> >>>>> >>>>> <http://www.openstreetmap.org/**?lat=51.32506&lon=5.97571&** >>>>> zoom=17&layers=T<http://www.openstreetmap.org/?lat=51.32506&lon=5.97571&zoom=17&layers=T> >>>>> > >>>>> >>>>> Also, if you make a route over a roundabout, you never use the full >>>>> roundabout, so why would you want the full roundabout in the relation? >>>>> >>>> >>>> Of course this is true, but I think it looks tidier the other way, >>>> look here. You see at once, that there is a roundabout. >>>> >>>> http://www.openstreetmap.org/?**lat=50.791022&lon=6.059449&** >>>> zoom=18&layers=T<http://www.openstreetmap.org/?lat=50.791022&lon=6.059449&zoom=18&layers=T> >>>> >>> >>> I don't see the difference there because it has only single ways >>> connecting to the roundabout. >>> >>> But let me ask this simple question: if you go from A to B via a >>> roundabout, do you traverse the whole roundabout or only a part of it? Why >>> then add the full roundabout to a relation that describes the route from A >>> to B? >>> >>> It is also clearer not to add the full roundabout. Take this example: < >>> http://www.openstreetmap.org/**?lat=51.333905&lon=5.995042&** >>> zoom=18&layers=T<http://www.openstreetmap.org/?lat=51.333905&lon=5.995042&zoom=18&layers=T> >>> > >>> >>> It is immediately clear that bus 62 goes from east to west. If you had >>> the complete roundabout in the relation, the whole roundabout would be red >>> and you would not know which direction the relation had. >>> >>> Regards, >>> Maarten >>> >>> >>> ______________________________**_________________ >>> Talk-nl mailing list >>> Talk-nl@openstreetmap.org >>> http://lists.openstreetmap.**org/listinfo/talk-nl<http://lists.openstreetmap.org/listinfo/talk-nl> >>> >> >> _______________________________________________ >> Talk-nl mailing list >> Talk-nl@openstreetmap.org >> http://lists.openstreetmap.org/listinfo/talk-nl >> >> > > _______________________________________________ > Talk-nl mailing list > Talk-nl@openstreetmap.org > http://lists.openstreetmap.org/listinfo/talk-nl > >
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