> to make my question more precise, please have a look at this tunnel that > crosses a railway track (the railway is a subway that runs at ground > level): > > http://www.openstreetmap.org/edit?lat=48.1325961&lon=16.3109488&zoom=19&way=29205957 > > The tunnel tag implies layer=-1
No, it doesn't. > and that leads to a junction of ways on > different layers on both ends of the tunnel. Which wouldn't be a problem either. Layer is only relevant for defining the relative order of intersecting (crossing) objects. If the objects don't intersect, or have a common node, their layers don't imply anything about their relative or absolute height. > On the western end of the tunnel the adjacent way ends, this should be > no problem with the layers; on the eastern end there is a T junction. > > Do you think, this tunnel is OK the way it is or should someone add a > small piece of way on layer 0 at the eastern end next to the T-junction > to avoid a T-junction of different layers? It is ok as it is. Regards, Marc -- Jetzt kostenlos herunterladen: Internet Explorer 8 und Mozilla Firefox 3 - sicherer, schneller und einfacher! http://portal.gmx.net/de/go/atbrowser _______________________________________________ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
