Martin Koppenhoefer <dieterdre...@gmail.com> writes: > sent from a phone > >> On 22 Mar 2017, at 09:15, Jean-Marc Liotier <j...@liotier.org> wrote: >> >> I answered too fast... Later in the thread John offers >> waterway=spillway + emergency=yes + surface=* which seem even better >> because it uses the generic emergency=yes instead of creating a new >> spillway=emergency > > > but emergency=yes is a legal access tag. Are there spillways that are > used as roads? With spillway=emergency it is made explicit that this > is a spillway category, not an access tag
Agreed. I was going to say that reusing emergency=yes was going to cause trouble. Also, presumably emergency spillways are mapped as areas, rather than lines, but they probably should have both, to have the water network and show the area. The one I am familiar with is really large - the point is to avoid erosion if it is ever used, to protect the dam from collapse which might happen if the primary spillway overflowed.
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