Hi, I'm planning to map some qanats, underground channels for conveying groundwater that have vertical excavation shafts visible from the surface/aerial imagery (see proposal for example).
This was previously discussed in 2013. Since then, the role of different waterway tags has been clarified, which indicates that waterway=canal is appropriate, combined with subtag canal=qanat and tunnel=flooded. Qanat shafts are still a little tricky as there are specific tags for mineshaft and water_well, but neither of these are really appropriate, and don't have a generic version. I'm proposing to use a generic man_made=excavation with subtag excavation=qanat_shaft. Here's the full proposal. Thanks to user emes, who drafted the original version in 2013. https://wiki.openstreetmap.org/wiki/Proposed_features/Qanat This email has two purposes: it would be great to have the formal proposal discussed and approved. But if consensus is impossible, I'll be mapping anyway, so I'm hoping for some feedback/alternative names before I go ahead and map 100s of them. Thanks in advance, Joseph
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