On 2018-02-28 23:21, Vao Matua wrote:
François
I don't have an example. I was trying to think of an example where
layer would be needed for a stream/road crossing. A pipe would
probably be a better example.
Sorry to cause a distraction.
My real question is "Why not allow tunnel=culvert to be a node?"
Emmor
If 2 ways share a node, then they must be connected to each other. ie on
the same layer. So one can't be above/below the other. A road and a
stream crossing on the same layer is a ford.
If you tag the shared node as a tunnel, then you don't know which way
goes through the tunnel. Does the stream go through a tunnel, or does
the road go through a tunnel, or both?
It is much more useful to map tunnels/bridges as a way. If you know
there is a tunnel, but don't know how long the tunnel is, you can
estimate it. ie based on the width of the road. You can add a note to
say the exact length/position is estimated.
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