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I'm not sure what a "sub river stream" is, but I'd have thought that the opposite of an embankment (in the railway sense) would be a cutting; so perhaps "man_made=cutting"? You can also micro-map each side of the embankment/cutting (left of the OSM way is higher ground, like for cliffs). You can represent any configuration this way. At this stage, the difference between an embankment and a cutting is pretty slim. Maybe it should depend on the engineering process (adding vs removing material), but I'm not sure.
(07 Jul '14, 10:27)
Vincent de P... ♦
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Since this thread came up on top of my search I want to leave a pointer to a (abandoned) proposal that I think is relevant - at least for linear features not so much roundish-ones (think about razed railways): https://wiki.openstreetmap.org/wiki/Proposed_features/hollow_way. |
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Just wait a few months and then tag it as natural=water. "sub river stream" is most likely an attempt to say: "secondary river channel that does not always have flow (but always has water) because there is a threshold at the upstream end". This is a common construction in "new nature" development. |
