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<div class="moz-cite-prefix">Large means?<br>
Small means?<br>
<br>
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. <br>
<br>
On 30/01/19 19:56, Eugene Podshivalov wrote:<br>
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cite="mid:CAEPw1JVtPmTMb15W2AZ=dxDAKsBrpoYL7yQ8sBz7TJUKgb-Meg@mail.gmail.com">
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<div>Here is a summary of the discussion to check if there is
a consensus.</div>
<div><br>
</div>
<div>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.</div>
<div><br>
</div>
<div>It is suggested to resolve the ambiguities by updating
the definitions as follows.</div>
<div><br>
</div>
<div>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.</div>
<div><br>
</div>
<div>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.</div>
<div><br>
</div>
<div>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.</div>
<div><br>
</div>
<div>Cheers,</div>
<div>Eugene</div>
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<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">вт, 29 янв. 2019 г. в 18:32,
marc marc <<a href="mailto:marc_marc_irc@hotmail.com"
moz-do-not-send="true">marc_marc_irc@hotmail.com</a>>:<br>
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<blockquote class="gmail_quote" style="margin:0px 0px 0px
0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Le
29.01.19 à 16:13, Eugene Podshivalov a écrit :<br>
> How to we proceed with this topic? Should a proposal be
created or the <br>
> wiki pages can be updated straight away by someone or
myself based on <br>
> this discussion?<br>
<br>
maybe it's a good idea to write a small-summary-only post<br>
to check if there is a consensus on this, because there are
probably <br>
many participants who have dropped out given the number of
emails that <br>
the subject has generated<br>
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