[Tagging] Drain vs ditch

Eugene Podshivalov yaugenka at gmail.com
Thu Jan 24 11:22:15 UTC 2019

> The question that still remains is: what does "small" and "large" mean?

I daresay there is no way and no need to clarify the meanings of "small"
and "large" for artificial waterways. We can leave this up to the user to
decide on it.
Even the definition of a steam as "you can jump over it" is not really
observed. You can jump over a 1-1.5 meter waterway but people are tagging 3
meter wide waterways as steams as well because otherwise there would be a
big difference between the stream 1-1.5 and river 1.5-10 meter width ranges
(waterways greater than 10m can already be mapped with waterbodies, so I
don't mention them there).

In the place where I live drainage ditches and drains can be from 0.1 to 5
meters wide, and anything greater then that can be called a canal.


вс, 20 янв. 2019 г. в 01:22, Markus <selfishseahorse at gmail.com>:

> On Wed, 16 Jan 2019 at 13:40, Eugene Podshivalov <yaugenka at gmail.com>
> wrote:
> >
> > ditch - Small artificial free flow waterways used for irrigating or
> draining land as well as for deviding land. Irrigation ditches can be lined
> or unlined, drainage ditches are usually unlined. Consider using
> waterway=canal for large irrigation or land drainage channels. Consider
> using waterway=drain for lined superflous liquid drainage channels.
> I would even go one step further and abandon waterway=drain.
> The question that still remains is: what does "small" and "large" mean?
> Regards
> Markus
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