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

[Joseph Eisenberg]

Re: Is the pond downstream from a watermill also a stream_pond?

I believe most traditional watermills are supplied by a short canal or
ditch, so the waterway and the pond are both artificial, no?  In that case
I would not use water=stream_pool since the examples are pools below small
waterfalls on natural streams.

-- Joseph Eisenberg

On Thu, Dec 24, 2020 at 10:16 AM Volker Schmidt <voschix at gmail.com> wrote:

> Is the pond downstream from a watermill also a stream_pond?
>
>
>
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> On Thu, 24 Dec 2020 at 19:10, Joseph Eisenberg <joseph.eisenberg at gmail.com>
> wrote:
>
>> The tag water=stream_pool was documented only at Key:water, so I've now
>> created a new page for the tag with more details after this discussion:
>>
>> https://wiki.openstreetmap.org/wiki/Tag:water%3Dstream_pool
>>
>> "The tag water <https://wiki.openstreetmap.org/wiki/Key:water>=
>> stream_pool is used to map the water area of a *stream pool*: a small
>> but relatively deep collection of fresh water, occurring along a narrow
>> stream. Water velocity in the pool is typically much lower than in the
>> stream. Frequently found below a waterfall, where it is also called a
>> "plunge pool". May be used as a "swimming hole".
>>
>> This tag is used for pools along narrow streams which are otherwise only
>> mapped as a linear way with waterway
>> <https://wiki.openstreetmap.org/wiki/Key:waterway>=stream
>> <https://wiki.openstreetmap.org/wiki/Tag:waterway%3Dstream>. For wider
>> rivers (mapped with waterway
>> <https://wiki.openstreetmap.org/wiki/Key:waterway>=river
>> <https://wiki.openstreetmap.org/wiki/Tag:waterway%3Driver>), the areas
>> of the river, including "pools", are typically mapped with waterway
>> <https://wiki.openstreetmap.org/wiki/Key:waterway>=riverbank
>> <https://wiki.openstreetmap.org/wiki/Tag:waterway%3Driverbank> or water
>> <https://wiki.openstreetmap.org/wiki/Key:water>=river
>> <https://wiki.openstreetmap.org/wiki/Tag:water%3Driver> instead."
>>
>> -- Joseph Eisenberg
>>
>> On Thu, Dec 24, 2020 at 5:43 AM Paul Allen <pla16021 at gmail.com> wrote:
>>
>>> On Thu, 24 Dec 2020 at 05:40, Andrew Harvey <andrew.harvey4 at gmail.com>
>>> wrote:
>>>
>>>> I'm giving away all my favourite spots here but both of these the
>>>> stream is mapped a a way, and has the pool under the waterfall mapped as an
>>>> area, so you can determine pools under a waterfall based on the
>>>> natural=water area with one of the nodes being a waterway=waterfall node.
>>>>
>>>> https://www.openstreetmap.org/way/531128566
>>>> https://www.openstreetmap.org/way/32173325
>>>>
>>>> If we want a separate tag for this that's fine, but currently people
>>>> use the water=stream_pool in OSM to tag these.
>>>>
>>>
>>> Until water=stream_pool came along, these would have been mapped
>>> as water=pond, or even left as natural=water without defining the
>>> type of water.  I expect many still are mapped that way, even
>>> today.
>>>
>>> Do we need to differentiate between stream pools and plunge pools
>>> given that so many of both are already mapped as ponds?  I can
>>> see arguments both ways and don't (yet) have strong feelings
>>> either way.
>>>
>>> --
>>> Paul
>>>
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