At what size is it that a ditch turns into a drain? Vr gr Peter Elderson
Op di 15 jan. 2019 om 14:28 schreef Eugene Podshivalov <yauge...@gmail.com>: > 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 > > If I did not read their proper wiki pages I would think that they differ > only in size with ditches being smaller than drains. > A tricky thing is that both drains and drainage ditches are used alog > paths or roads but we call it a drain only when it is part of a system of > collecting and disposing of rain water in an urban area as described at > https://en.wikipedia.org/wiki/Storm_drain > > So again we just need to properly document the meanings of these tags. > > Eugene > > сб, 12 янв. 2019 г. в 19:40, Markus <selfishseaho...@gmail.com>: > >> On Fri, 11 Jan 2019 at 21:03, François Lacombe >> <fl.infosrese...@gmail.com> wrote: >> > >> > Regarding ditch, it regards both useful and waste water. >> >> While true in English usage, waterway=drain apparently was intended >> for artificial waterways removing undesirable water: >> >> https://lists.openstreetmap.org/pipermail/tagging/2018-August/038505.html >> >> See here for the whole discussion about 'How to tag small canals?' >> from August 2018: >> >> >> https://lists.openstreetmap.org/pipermail/tagging/2018-August/thread.html#38452 >> >> If you want to extend the meaning of waterway=drain to also include >> artificial waterways, how do you intend to differentiate them from >> waterway=canal? >> >> Regards >> >> Markus >> >> _______________________________________________ >> 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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