[Tagging] The saga of landuse=reservoir vs water=reservoir

[Kevin Kenny]

On Wed, Dec 16, 2020 at 12:58 PM Tomas Straupis <tomasstraupis at gmail.com>
wrote:

>   Why? Cayaking info is pretty rare - opposite of lake/reservoir data.
> Therefore it's fine to map what you need only:
>   https://upes.openmap.lt/#17/56.296411/22.330154


Looks good, I think... but what is the tagging?

An example (with part of the hydrography and nearly all of the landcover
from non-OSM sources) follows. I'm rendering polygons of the river with a
white overlay when they are stretches of rapids.  The rapids can be short
and relatively discrete as at
https://kbk.is-a-geek.net/catskills/test4.html?la=43.3152&lo=-73.8440&z=15
In the mountains, though, there may be long stretches of nearly continuous
whitewater:
https://kbk.is-a-geek.net/catskills/test4.html?la=43.3604&lo=-74.3637&z=14
The last time I looked, there was no non-deprecated way to map the
information that I had.

I now see that @jeisenbe has restored the `waterway=rapids` tag to the
Wiki.

At the time I last had the discussion, the version of the page on the Wiki
looked like
https://wiki.openstreetmap.org/w/index.php?title=Tag:waterway%3Drapids&oldid=1322133
- deprecating the tag.  On the other hand, the discussion on
https://wiki.openstreetmap.org/wiki/Whitewater_sports is highly technical.
I know that I am not skilled enough at whitewater paddling (I did a little
in my youth, but my youth is quite a long time ago) to make a safe
assessment of grade, and the `Whtiewater sports' page makes no mention of
'grade=unknown'. I asked here on the mailing list, and the only answers
that I got were along the lines of "then don't map it."  So for several
years I haven't attempted to map rapids. The ones I know of and want to
render, I maintain separately from OSM, because the previous discussion had
caused me to label this feature mentally as, "OSM doesn't want this mapped."


-- 
73 de ke9tv/2, Kevin
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