I think the whole problem cannot be solved in general as it depends from case to case.
A nice example of where the clear distinction between "natural river" and "artificial canal" is hard to tell is the river Altmühl: Its most downstream part has been built into a canal, which later leaves the "natural" bed and continues to connect it to the river Main. Still it is often named "Main-Donau-Kanal" even where the old river bed is. See for example this way [1], which is a part tagged as river but has the name "Kanal". Is this a river or a canal? Additionally it is in the middle of sections that are tagged as "Altmühl", so the river "ceases to exist" in our mapping for some range. I guess one always has to decide this on a local level and acknowledge that rivers in many parts of the world are not "natural" anymore. [1] https://www.openstreetmap.org/way/599254030 On 25/04/2019 23.54, Paul Allen wrote: > On Thu, 25 Apr 2019 at 22:16, Graeme Fitzpatrick <graemefi...@gmail.com> > wrote: > >> Getting away from the discussion of river v canal & back to the original >> problem pictured >> https://www.openstreetmap.org/way/347369154 , why is it "River Wey >> Navigation" while the river itself is just "Wey" >> > > Canals, when used for boats, are often known as navigation canals. And > sometimes > referred to as just navigations. > > It looks to me like the River Wey Navigation might be a canal to shorten > the route for river traffic > (or maybe because the river at that point wasn't deep enough and it was > cheaper to construct > a canal than dredge the river). Which would make sense. Which is why I'm > probably wrong, > because things rarely make sense. > > & is the unnamed river to the South >> https://www.openstreetmap.org/way/23216681, the natural Wey? >> > > It could be the curd. :) > > Actually, it may not be the natural Wey. Not going by the OS 1:25k > historic layer. Which is > incomplete. But the same layer is available from NLS (easy to select with > JOSM, but if you're > using iD then use https://geo.nls.uk/mapdata2/os/25000/{zoom}/{x}/{-y}.png > as your custom > layer (I have asked iD to use the NLS version instead but the iD team just > respond by > saying they don't want that historic layer there anyway because they think > it confuses people). > It looks like the natural river got diverted at some point after the canal > was built in order to > make room for roads. But that is a wild guess on my part. > > > _______________________________________________ > Tagging mailing list > Tagging@openstreetmap.org > https://lists.openstreetmap.org/listinfo/tagging >
signature.asc
Description: OpenPGP digital signature
_______________________________________________ Tagging mailing list Tagging@openstreetmap.org https://lists.openstreetmap.org/listinfo/tagging
