2013/9/28 Michał Sałaban <mic...@salaban.info> > > I realized it is not easy to make a distinction between canal and > aqueduct, but we may assume that the latter is usually for drinking > water or irrigation of small areas of land. Everything dealing with > navigation, flood protection or vast area irrigation would be rather a > canal. >
Yes, it's a fuzzier distinction than I thought. After a bit of reading i guess an aqueduct is any man made structure that carries water, for whatever purpose, even navigating boats. So canal is a type of aqueduct. I like waterway=aqueduct. If it's on a bridge, bridge=yes, if it is on a wall, barrier=wall. Quanat gets a tunnel=yes, and aqueduct=quanat. For the holes maybe something like man_made=shaft? Janko
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