ср, 30 янв. 2019 г. в 13:02, Warin <61sundow...@gmail.com>: > Large means? > Small means? > > To me I'd use small = I can step over it, large means I cannot step over > it .. so ~1.1 metres is the line between the two. > Drains and ditches can be 0.1 to 5 metres wide. You can hardly step over a 2-5 metre wide ditch, can you? Anything greater than that can be called a canal. So I would leave this up to the user to decide on.
Cheers, Eugene ср, 30 янв. 2019 г. в 13:04, Joseph Eisenberg <joseph.eisenb...@gmail.com>: > Those descriptions look good > On Wed, Jan 30, 2019 at 5:58 PM Eugene Podshivalov <yauge...@gmail.com> > wrote: > >> Here is a summary of the discussion to check if there is a consensus. >> >> Current definitions of artificial waterways are unclear and ambiguous. >> Some people assume that ditch and drain differ mainly in size, others >> differentiate them mainly on liquid type (can or cannot carry industrial >> discharge), others rely on lined or unlined characteristic. >> >> It is suggested to resolve the ambiguities by updating the definitions as >> follows. >> >> canal - Large man-made open flow (free flow vs pipe flow) waterways used >> to carry useful water for transportation, hydro-power generation, >> irrigation or land drainage purposes. Consider using waterway=ditch for >> small irrigation or land drainage channels. Consider using waterway=drain >> for small usually lined superflous liquid drainage channels. >> >> drain - Small artificial free flow waterways usually lined with concrete >> or similar used for carrying away superflous liquid like rain water or >> industrial discharge without letting it soak into the ground. Consider >> using waterway=ditch for unlined channels used to drain nearby wet land. >> Consider using waterway=canal for large unlined land drainage channels. >> >> ditch - Small artificial free flow waterways used for irrigating dry land >> or draining wet land. Irrigation ditches can be lined or unlined, drainage >> ditches are usually unlined to let water soak through the land into them. >> Ditches may have short lined segments at waterway turning points or >> intersections with roads or paths to prevent erosion. Consider using >> waterway=canal for large irrigation or land drainage channels. Consider >> using waterway=drain for usually lined superflous liquid drainage channels. >> >> Cheers, >> Eugene >> >> вт, 29 янв. 2019 г. в 18:32, marc marc <marc_marc_...@hotmail.com>: >> >>> Le 29.01.19 à 16:13, Eugene Podshivalov a écrit : >>> > How to we proceed with this topic? Should a proposal be created or the >>> > wiki pages can be updated straight away by someone or myself based on >>> > this discussion? >>> >>> maybe it's a good idea to write a small-summary-only post >>> to check if there is a consensus on this, because there are probably >>> many participants who have dropped out given the number of emails that >>> the subject has generated >>> _______________________________________________ >>> Tagging mailing list >>> Tagging@openstreetmap.org >>> https://lists.openstreetmap.org/listinfo/tagging >>> >> _______________________________________________ >> Tagging mailing list >> Tagging@openstreetmap.org >> https://lists.openstreetmap.org/listinfo/tagging >> > _______________________________________________ > Tagging mailing list > Tagging@openstreetmap.org > https://lists.openstreetmap.org/listinfo/tagging >
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