floodgate would seem to be the general term for these sorts of things; sluice_gate would be a subtype:
http://en.wikipedia.org/wiki/Floodgate i'm no expert, but the wikipedia article looks like a reasonable start. richard On 1/3/11 3:33 PM, Paul Norman wrote:
All the sluice gates I've seen are on the scale of 1m in opening size. A quick google image search also seems to only turn up small gates. I suppose there could be some large gates out there, so the proposal might need to include ways or even areas. As for riverbanks, the ones I've seen are near riverbanks, but not actually on them. In the case of a sluice gate that is actually on the bank, you'd have a node that is shared between the small waterway (waterway=ditch or waterway=stream), the riverbank, and is tagged with waterway=sluice_gate
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