This sounds like a sluice gate to me: http://wiki.openstreetmap.org/wiki/Proposed_features/sluice_gate
Or is there some significant difference? On Fri, Apr 21, 2017 at 3:43 AM, John Willis <jo...@mac.com> wrote: > this object is what I am interested in tagging: > > https://www.openstreetmap.org/way/488358755#map=19/36.22843/139.30731 > > > Along the hundreds of KM of levees surrounding the large river near my > house, each stream, drain, canal, storm drain, etc has a culvert through > the levee, controlled by a manual or electrically controlled “gate” valve. > similar structures are seen all over Japan, so there are conservatively > thousands of these gate valves mappable from imagery just here in Japan. > > some are very small (50cmx50cm for a drain) and some are very large (1x3m > for a stream), but all share some common traits: > > - control water from a small waterway going into a larger waterway, often > through a culvert under a levee. > > - easily mappable from arial imagery. > > - Valve structure is on the inside edge of the levee, not on the sides of > the embankment nor the top. > > - the control structure for the gate valve sticks up out of the the ground > to the height of the adjacent levee. > > - some are human operated, some have electric motors, but there is always > mechanical mechanism on top for opening and closing the gate valve. > > > some also have related items: > > - a second valve on the outside of the levee for safety redundancy or flow > control for pumps. > > - a footbridge out from the top of the levee to the top of the valve > control mechanism > > - a building on top of the gate structure to cover the valves (not a > pump-house) > > - a small reservoir to hold water if the gate is closed. (easily tagged) > > - the valve structure on the inside of the levee is protected by concrete > erosion protection along the sides of the levee and the bottom of the > floodplain. (man-made erosion protection has no tag) > > Rarely: > > - a pumphouse adjacent for forcing water into the river. > (man_made=pumping_station) > > - a landuse that is fenced and surrounds the valve if there are buildings > and a reservoir. usually these have no surrounding land - they just sit out > in the open with no protection or additional structures. > > > > waterway=flow_control has 200 overall uses https://taginfo. > openstreetmap.org/tags/waterway=flow_control ( my first time to see it). > > and waterway=valve has 10 uses > > > > I would like suggestions for: > > > is waterway=flow_control a good node value to use for these valves on a > waterway? It seems okay to me. > > for valve structures that are very large (some are the size of a large > truck) and easily mappable as a structure, what to use for that? I used > building=yes + man_made=valve for the building. > > I put a waterway=flow_control node where the culvert exits through the > gate valve. > > a landuse for some water control complexes - landuse=industrial? > man_made=umping_station on the area rather than the building? > man_made=water-works seems really wrong. > > > > here is a pumphouse site I tagged with the valve above. > > https://www.openstreetmap.org/#map=19/36.22858/139.30654 > > https://www.pref.saitama.lg.jp/a0906/gijutukanri/documents/h26.pdf (pictures > on the 5th page). > > - it has 2 gates valves, one on either side of the levee. > - a reservoir > - a building for the pumphouse. > - a fenced area around the site. > > > Please give me some advice on the gates. > > Javbw. > > > > > > _______________________________________________ > Tagging mailing list > Tagging@openstreetmap.org > https://lists.openstreetmap.org/listinfo/tagging > >
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