[OSM-talk] Ditches

Steve Bennett stevagewp at gmail.com
Tue Dec 15 13:17:02 GMT 2009


On Wed, Dec 16, 2009 at 12:10 AM, Ian Dees <ian.dees at gmail.com> wrote:
> Although nothing is "required" in OSM, the layer tag always helps on a
> bridge because you could have multiple bridges passing each other (as in a
> highway interchange). In that case, the layer tag specifies at what "layer"
> in the 3rd dimension the bridge exists.


Um, the layer tag helps specifically *only* in cases with bridges over
bridges...which are exceedingly rare. So I would dispute your premise
that "the layer tag always helps on a bridge".

Steve




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