Thanks Graeme.
> I did this: > https://www.openstreetmap.org/node/5213660838#map=19/-28.07783/153.42664 > for one stormwater drain nearby. > I don't quite understand the way extending to the north in your example tagged just man_made=yes and surface=grass, is that the underground pipe joining to the rest of the network? Would that work for your purposes? > Regarding the node on the end, yes I think it should work. I always viewed man_made=pipeline for legit big pressurised pipelines but I can't see any harm using it for stormwater drains especially that some get really big. man_made=pipeline location=underground substance=rainwater The wiki page says man_made=pipeline shouldn't be applied to nodes but there are already nearly 4000 so that can change, or if I have a decent idea which way the underground pipes go (easy for the big ones) just map a short way. Thinking about how this would apply to other waterways I've mapped, I currently map the streams or drains that pass under roads which rainwater passes through like below, these are quite similar but with a completely different tagging scheme. waterway=drain or stream tunnel=culvert layer=-1 Do we use waterway=* where it is a naturally occurring stream but humans earthfilled the location with a concrete culvert and put a road over the top but that is still part of the earth's waterways of the creek system. Can't be true because waterway=drain is for man made waterways. This tagging also appears valid for a big stormwater drain where you can walk into it: waterway=drain tunnel=flooded location=underground (https://wiki.openstreetmap.org/wiki/Tag:tunnel%3Dflooded) Unfortunately it doesn't render in any way, so there's nothing showing on > the map to indicate that there's anything there, until you go into edit > mode :-( > I'm not too worried about rendering. In the past I've left a note on the first node because these drain outlets usually can't be seen from aerial imagery and many times the creek directly where it pours doesn't even look like a creek from aerial imagery, so the intention was to capture the information to ensure armchair mappers don't "fix" the creek. As usual each time I post on the mailing list it opens a can of worms and I learn too much about all the different possible tags :).
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