I saw some strange rendering effects when a side road was straight onto a bridge. The bridge was layer=1, so the side road was rendered on top of the main road. That's why all the ways approaching a junction should be on the same layer. You can either achieve this by inserting a short way between the bridge and the junction, or by altering the layer of the thing that is bridged (ie making the stream layer=-1)
Richard On Fri, Jul 31, 2009 at 11:01 AM, "Marc Schütz" <[email protected]> wrote: > > 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 > [email protected] > http://lists.openstreetmap.org/listinfo/talk >
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