Hi
This maybe UK specific but it's a tagging problem & maybe wider spread.
To allow navigation, rivers occasional have lock gates, usually as a
separate channel. Some contributors tag these incorrectly as
waterway=canal for the centre line.
https://www.openstreetmap.org/way/347369154
However, they are still rivers, they just have canalized sections. If
this logic was applied to all lengths of river every one that passes
through a city, such as the East River, Seine or Thames would be tagged
as canal, which is of course, ridiculous.
Canals are man-made channels to allow water to flow where it naturally
wouldn't
If the locks were removed from rivers the water would still flow.
Canal is a noun.
Canalise is a verb.
Cheers
DaveF
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