<div dir="ltr"><div><div><div><div><div>I am need of a tag for this for many waterways near the sea here, as there waterflow is controlled by gates or is tidal or is both. I like flow_direction.<br><br></div>However it's a tricky business. Take the river Thames, which can be tidal up to London, depending on tides (and wind). But I would be reluctant to tag the river's water flow from London downwards as flow_direction=both<br><br></div>Also, one needs more values:<br></div>flow_direction=forward|backward|tide_dependent|operator_controlled|...<br></div>default value: forward<br><br></div>I also would like to tag one-way sluice gates ("porte vinciane") that work as back-flow-protection valves in waterways, typically to prevent the influx of saline water at high tide. I have used sluice_gate and lock_gate for this, but am unhappy about both.<br></div><div class="gmail_extra"><br><div class="gmail_quote">On 7 September 2015 at 18:16, Martin Koppenhoefer <span dir="ltr"><<a href="mailto:dieterdreist@gmail.com" target="_blank">dieterdreist@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div class="gmail_extra"><span class=""><br><div class="gmail_quote">2015-09-07 17:57 GMT+02:00 moltonel 3x Combo <span dir="ltr"><<a href="mailto:moltonel@gmail.com" target="_blank">moltonel@gmail.com</a>></span>:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div style="overflow:hidden">I don't know of an existing tag. I've searched for 'flow' and<br>
'up/downstream' in taginfo, but the only thing I found came from<br>
imports and had very bad values from an OSM POV. Unless somebody has a<br>
better Idea, I suggest creating a tag.<br>
waterway:flow=forwards/backwards come to my mind, but that's an<br>
endlessly bikeshedable topic.</div></blockquote></div><br><br></span>there are some very few occurences of previously mentioned "flow_direction" <a href="http://taginfo.osm.org/keys/flow_direction#overview" target="_blank">http://taginfo.osm.org/keys/flow_direction#overview</a><br></div><div class="gmail_extra">we could also use incline=up/down (is in use, but rarely in conjunction with waterways)<br><br></div><div class="gmail_extra">More often I found the undocumented "oneway:flow" <a href="http://taginfo.osm.org/keys/oneway%3Aflow" target="_blank">http://taginfo.osm.org/keys/oneway%3Aflow</a><br></div><div class="gmail_extra">(there is a oneway restriction in flow direction?) values are yes/no.<br><br></div><div class="gmail_extra">There are also 634 times "FlowDir" (atypical key name, likely from an import)<br><br></div><div class="gmail_extra">Personally from the values in use that I found I'd go with "flow_direction" (values in use are "forward" and "both"), because its not an abbreviation and quite verbose in what it is describing. "oneway:flow" doesn't make much sense to me.<br></div><div class="gmail_extra"><br></div><div class="gmail_extra">cheers,<br></div><div class="gmail_extra">Martin<br></div></div>
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