<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div class="">this object is what I am interested in tagging:</div><div class=""><br class=""></div><div class=""><a href="https://www.openstreetmap.org/way/488358755#map=19/36.22843/139.30731" class="">https://www.openstreetmap.org/way/488358755#map=19/36.22843/139.30731</a></div><div class=""><br class=""></div><div class=""><br class=""></div><div class="">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. </div><div class=""><br class=""></div><div class="">some are very small (50cmx50cm for a drain) and some are very large (1x3m for a stream), but all share some common traits:</div><div class=""><br class=""></div><div class="">- control water from a small waterway going into a larger waterway, often through a culvert under a levee.</div><div class=""><br class=""></div><div class="">- easily mappable from arial imagery. </div><div class=""><br class=""></div><div class="">- Valve structure is on the inside edge of the levee, not on the sides of the embankment nor the top.</div><div class=""><br class=""></div><div class="">- the control structure for the gate valve sticks up out of the the ground to the height of the adjacent levee. </div><div class=""><br class=""></div><div class="">- some are human operated, some have electric motors, but there is always mechanical mechanism on top for opening and closing the gate valve. </div><div class=""><br class=""></div><div class=""><br class=""></div><div class="">some also have related items:</div><div class=""><br class=""></div><div class="">- a second valve on the outside of the levee for safety redundancy or flow control for pumps. </div><div class=""><br class=""></div><div class="">- a footbridge out from the top of the levee to the top of the valve control mechanism </div><div class=""><br class=""></div><div class="">- a building on top of the gate structure to cover the valves (not a pump-house) </div><div class=""><br class=""></div><div class="">- a small reservoir to hold water if the gate is closed. (easily tagged)</div><div class=""><br class=""></div><div class="">- 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) </div><div class=""><br class=""></div><div class="">Rarely: </div><div class=""><br class=""></div><div class="">- a pumphouse adjacent for forcing water into the river. (man_made=pumping_station)</div><div class=""><br class=""></div><div class="">- 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. </div><div class=""><br class=""></div><div class=""><br class=""></div><div class=""><br class=""></div>waterway=flow_control has 200 overall uses <a href="https://taginfo.openstreetmap.org/tags/waterway=flow_control" class="">https://taginfo.openstreetmap.org/tags/waterway=flow_control</a> ( my first time to see it).<div class=""><br class=""></div><div class="">and waterway=valve has 10 uses </div><div class=""><br class=""></div><div class=""><br class=""></div><div class=""><br class=""></div><div class="">I would like suggestions for: </div><div class=""><br class=""></div><div class=""><br class=""></div><div class="">is waterway=flow_control a good node value to use for these valves on a waterway? It seems okay to me. </div><div class=""><br class=""></div><div class="">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. </div><div class=""><br class=""></div><div class="">I put a waterway=flow_control node where the culvert exits through the gate valve. </div><div class=""><br class=""></div><div class="">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. </div><div class=""><br class=""></div><div class=""><br class=""></div><div class=""><br class=""></div><div class="">here is a pumphouse site I tagged with the valve above. </div><div class=""><br class=""></div><div class=""><a href="https://www.openstreetmap.org/#map=19/36.22858/139.30654" class="">https://www.openstreetmap.org/#map=19/36.22858/139.30654</a></div><div class=""><br class=""></div><div class=""><a href="https://www.pref.saitama.lg.jp/a0906/gijutukanri/documents/h26.pdf" class="">https://www.pref.saitama.lg.jp/a0906/gijutukanri/documents/h26.pdf</a> (pictures on the 5th page). </div><div class=""><br class=""></div><div class="">- it has 2 gates valves, one on either side of the levee.</div><div class="">- a reservoir </div><div class="">- a building for the pumphouse. </div><div class="">- a fenced area around the site. </div><div class=""><br class=""></div><div class=""><br class=""></div><div class="">Please give me some advice on the gates. </div><div class=""><br class=""></div><div class="">Javbw. </div><div class=""><br class=""></div><div class=""><br class=""></div><div class=""><br class=""></div><div class=""><br class=""></div></body></html>