On Tue, 15 Jan 2019 at 23:28, Eugene Podshivalov <yauge...@gmail.com> wrote:
> The confusion is mainly in the difference between irrigation canals vs > irrigation ditches and drainage diches vs drains. > > In practice wide irrigation channels are called canals whereas small ones > are called diches and people tend to tag them as such. > This tendency is enforced by the fact that canals and diches are rendered > in difference size. > IMO there is no problem here, we should just document this usage properly. > > Drainage diches and drains are confused simply because of their identical > definition on the waterway wiki page > https://wiki.openstreetmap.org/wiki/Key:waterway > drain - An artificial free flow waterway used for carrying superfluous > water like storm water... > ditch - An small artificial free flow waterway used for carrying > superfluous water along paths or roads for drainage purposes > So, would we all be happy with redoing the various wiki pages along these lines: =canal: current: Use waterway <https://wiki.openstreetmap.org/wiki/Key:waterway>= canal for man-made *open flow* (free flow vs pipe flow) waterways <https://wiki.openstreetmap.org/wiki/Waterways> used to carry useful water for transportation, hydro-power generation or irrigation purposes. suggested: Use waterway <https://wiki.openstreetmap.org/wiki/Key:waterway>= canal for large man-made *open flow* (free flow vs pipe flow) waterways <https://wiki.openstreetmap.org/wiki/Waterways> used to carry useful water, usually for transportation, but also for hydro-power generation or irrigation purposes =drain current: Use waterway <https://wiki.openstreetmap.org/wiki/Key:waterway>= drain for artificial waterways <https://wiki.openstreetmap.org/wiki/Waterways>, typically lined with concrete or similar, used to carry superfluous water like storm water or grey-discharge. suggested: Use waterway <https://wiki.openstreetmap.org/wiki/Key:waterway>= drain for artificial waterways <https://wiki.openstreetmap.org/wiki/Waterways>, typically lined with concrete or similar, usually used to carry water for drainage or irrigation purposes. =ditch current: Use waterway <https://wiki.openstreetmap.org/wiki/Key:waterway>= ditch for simple narrow artificial waterways <https://wiki.openstreetmap.org/wiki/Waterways> used to drain nearby land, to remove storm-water or similar. Ditches are usually straight (as opposed to natural streams). They may contain little water or even be dry most of the year – to mark this intermittent <https://wiki.openstreetmap.org/wiki/Key:intermittent>=yes may be used. suggested: Use waterway <https://wiki.openstreetmap.org/wiki/Key:waterway>= ditch for simple narrow artificial waterways <https://wiki.openstreetmap.org/wiki/Waterways>, typically unlined, usually used to remove storm-water or similar from nearby land. Ditches are usually straight (as opposed to natural streams). They may contain little water or even be dry most of the year – to mark this intermittent <https://wiki.openstreetmap.org/wiki/Key:intermittent>=yes may be used. New category =channel Use waterway <https://wiki.openstreetmap.org/wiki/Key:waterway>=channel for small man-made *open flow* waterways <https://wiki.openstreetmap.org/wiki/Waterways> used to carry useful water, usually for irrigation purposes. Channels are usually straight, but can be either lined or unlined. Would something like that clarify matters? Thanks Graeme
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