[Tagging] Drain vs ditch
61sundowner at gmail.com
Wed Jan 30 10:00:29 UTC 2019
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.
On 30/01/19 19:56, Eugene Podshivalov 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
> 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.
> вт, 29 янв. 2019 г. в 18:32, marc marc <marc_marc_irc at hotmail.com
> <mailto:marc_marc_irc at 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
> the subject has generated
> Tagging mailing list
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