[Tagging] Definition of lake/pond as applied to stream/plunge pools

[Paul Allen]

On Wed, 23 Dec 2020 at 06:21, Andrew Harvey <andrew.harvey4 at gmail.com>
wrote:

>
> All the ones I've encountered the stream/river was only ever mapped as a
> linear way, so it's just a linear way for the stream and then an area way
> for the stream pool.
>

That works fine for streams.  It even works for narrow rivers.  It doesn't
work so well for wide rivers where you map the banks with water=river.
You can do it that way, but it seems a bit of a kluge.

>
> So for creeks would you also use river=stream_pool or have also
> stream=stream_pool?
>

The only creek I encountered was on a wide river, so I just expanded the
water=river into the creek.  Maybe we need a water=creek.  Except
"creek" means different things in different parts of the world, so we'd
spend forever arguing about the name. :)


> I guess that's fine too. I see your point, it's just I'd never really
> considered mapping streams/rivers with stream pools as anything other than
> a linear way.
>

Consider this river.  It's wide.  And it's long (so there's a lot of
water=river
still to be added).  However, from sources I cannot use (copyright) I know
there's a pool on a bend, but I don't know exactly where on the bend or
its exact extent.  It doesn't resemble a pond with a stream flowing through
it, it's more of a portion of river near the bank where the water flow
rate is negligible.  It's somewhere around here:
https://www.openstreetmap.org/?mlat=52.06119&mlon=-4.58477#map=17/52.06119/-4.58477

Here's the angling association map which includes it (and several
other pools): https://teifitrout.co.uk/tta-waters/  It's on the Llechryd
beat
(which should come up as default) and it's Pwll Erylin (marked as
point A31).  Take a look at Cenarth for a beat with lots of pools.

When (if) we figure out how to handle pools, and maybe a few other
river features, I'll approach the angling association and see if they'd
be willing to help add such features to OSM.  Maybe one of their
members will think about adding other things to the map when
the weather is too bad for fishing.

-- 
Paul
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