2009/12/15 Peter Childs <pchi...@bcs.org>: > If you have a bridge or a tunnel you don't need a layer tag a bridge > infers it "goes over" a tunnel that it "goes over"
Let's start with the basics, we're talking about a water way and a road way, what if neither is tagged with layer or tunnel or bridge tags and there is no connecting nodes for the 2 ways, > If there is neither a tunnel, or a bridge and no layer either then it > must be a ford. Only if there is a connecting node, otherwise you are just guessing as what it should be. > If you mark bridge=yes, layer=1 you are repeating your self. which is > where problems start, see database normalisation. That's making the assumption that all redundency is a bad thing, some times it helps reduce guesswork. _______________________________________________ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
