On Mon, 20 Jul 2020 at 11:28, Paul Allen <pla16...@gmail.com> wrote: > On Mon, 20 Jul 2020 at 10:59, Volker Schmidt <vosc...@gmail.com> wrote: > >> manhole=drain is widely used in OSM for water drainage grids, that are >> not suitable for people to entr - se the photo on the wikipage >> <https://wiki.openstreetmap.org/wiki/Tag:manhole%3Ddrain> >> > > People have used manhole=drain for that purpose and the wikipage > for manhole=drain documents that use. However, that photo appears > to be of a UK storm drain which is not a manhole by my definition > (too small for entry by a person) or by the wiki's definition for > Key:manhole which states "Hole with a cover that allows access to > an underground service location, just large enough for a human to climb > through." > > In my opinion we should deprecate manhole=drain except where > it really is large enough for access by a person. We need a > better tag. Well, two tags. One for storm drains and one > for sinks that are too small to merit natural=sinkhole with > any of the current sinkhole=* types. Oh, and a tag for > spreads, too. > > -- > Paul >
I think we also need one for "entrances" to pipes/tunnels of unknown extent where the entrance is by horizontal movement of the water rather than by falling into a hole. The presence/absence of gratings or mesh may be useful for these too.
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