In terms of the tags as defined on the wiki, the most relevant bit is probably: "For a smaller artificial waterways used for irrigation consider waterway <http://wiki.openstreetmap.org/wiki/Key:waterway>=drain <http://wiki.openstreetmap.org/wiki/Tag:waterway%3Ddrain> or waterway <http://wiki.openstreetmap.org/wiki/Key:waterway>=ditch <http://wiki.openstreetmap.org/wiki/Tag:waterway%3Dditch>." but it's not for irrigation (spreading water over fields) and neither "drain" nor "ditch" are words I'd naturally use (as English words) for that --- I'd call it an irrigation channel.
In terms of its function, a leat is effectively an open-topped pipeline for water, taking it from one or more water sources to a specific place (such as a water purification works for a settlement). __John On Fri, Apr 21, 2017 at 12:58 PM, Christoph Hormann <[email protected]> wrote: > On Friday 21 April 2017, Chris Hill wrote: > > A leat is a very specific thing. It is certainly not a canal, but > > neither is it a ditch nor drain. I would favour waterway=leat. That > > describes, unambiguously, exactly what it is. > > I guess from your perspective it is but please try to define the meaning > of waterway=leat for non-native English speakers from a completely > different part of the world in a way that clearly tells them when to > use this tag and when to use a different one. > > For native English speakers this is often much more difficult - you try > to synchronize your use of waterway=canal/ditch/drain with your > understanding of these terms in your language - and inevitably fail > with that attempt. I just use these tags as defined on the wiki or as > they are used by other mappers and don't concern myself with the > inherent meaning of the value outside OSM. > > -- > Christoph Hormann > http://www.imagico.de/ > > _______________________________________________ > Tagging mailing list > [email protected] > https://lists.openstreetmap.org/listinfo/tagging >
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