[Tagging] Double, double, toil and trouble (how to map Witch's Cauldron?)

Paul Allen pla16021 at gmail.com
Sun Oct 7 18:32:03 UTC 2018


On Sun, Oct 7, 2018 at 6:26 PM Mateusz Konieczny <matkoniecz at tutanota.com>
wrote:

> I would tag it as a waterway in tunnel (though I have no idea about a
> suitable value)
>

For me, a tunnel is man-made, not natural.  The tunnel=* I see in the wiki
seem (at quick glance)
to all be man-made.

or as water area with covered=yes and natural=bare_rock area mapped, both
> with a proper tags.
>

Better, although natural=arch seems like a better fit, even if it's
undocumented.  But that still
doesn't deal with the water under the arch and in the basin.

It also sounds like it is a tourism=attraction .
>

A very minor attraction.  I was intending to add that but it didn't seem to
pose any problems so I
didn't mention it.

Sounds a bit similar to https://en.wikipedia.org/wiki/Blue_Hole_(Red_Sea) -
> though
> this one is entirely underwater and of a different origin.
>

Not a good match.  But it led me into a twist maze of Wikipedia pages and
eventually I found
https://en.wikipedia.org/wiki/Sea_cave  So now I know that technically it
is a collapsed littoral
cave or collapsed sea cave.  There's one in Oregon called Devil's Punchbowl
which has been
turned into a proper tourist attraction:
https://www.openstreetmap.org/#map=19/44.74739/-124.06529
Whoever mapped that didn't deal with the water aspect in any way but did
add something I hadn't
thought of: the cliff edge around it.  Without the water it just looks like
a hilly area with a depression.

-- 
Paul
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