On Tue, Oct 12, 2010 at 11:26 AM, Pieren <[email protected]> wrote: > "layer" is just saying what is on the top when two objects/lines are > crossing each other. If you have only one element, the layer tag is really > optionnal (this until someone is tracing what is below). Even if you have two elements, it's obvious which is above the other if only one is bridge=* or tunnel=*. The purpose of the layer tag is to resolve ambiguities when two above-ground or two below-ground features cross.
> And we can also put the layer tag on the element under the bridge. Remembering of course that the ground is layer=0, so unless something under a bridge is in a tunnel it too is layer=0. _______________________________________________ Tagging mailing list [email protected] http://lists.openstreetmap.org/listinfo/tagging
