[Tagging] Tagging remain of extinct volcanoes

[Joseph Eisenberg]

A natural=volcano is suppose to be a volcanic vent, usually found at the
center of a crater.

While it’s common to misuse this tag to mark the highest peak of a mountain
of volcanic origin, it would be best to use it for the actual center of the
volcanic vent, and use natural=peak for the high point.

Some recently extinct volcanoes might have a visible crater wall or an open
vent, is they are low elevation or latitude in areas without glaciers or
heavy rainfall (extinct craters usually erode quickly). But it would be
most verifiable if only volcanic vents with clear signs of recent activity
are tagged.

An eroded remnant of a volcano in Germany which hardly looks like a crater
should not be tagged natural=volcano, since the classification as a volcano
is based on fieldwork by professional geologists and can’t be confirmed by
regular mappers.

Extinct volcanoes might get a tag that could be attached to a natural=peak
node; e.g.natural=peak +
volcano:status=extinct

Joseph

On Tue, Jul 23, 2019 at 11:19 PM Mateusz Konieczny <matkoniecz at tutanota.com>
wrote:

> Is it OK to use natural=volcano for remains of volcanoes?
>
> There is volcano:status=extinct but I feel that tagging
> volcano-related rocks as volcanoes is a poor idea.
>
> See
>
> https://www.steinmann.uni-bonn.de/institut/bereiche/endogene-prozesse/arbeitsgruppen/strukturgeologie/lehre/aufschluesse-im-rheinland/dachsbusch
> for a real example (text in German, but images should be clear).
>
> Triggered by
> https://www.openstreetmap.org/note/1792260#map=18/50.42869/7.23260
>
> Similar examples include
> Góra Swiętej Anny / Annaberg
> https://pl.wikipedia.org/wiki/G%C3%B3ra_%C5%9Awi%C4%99tej_Anny -
> https://www.openstreetmap.org/node/2241712057/history
> volcano existed here 27 millions years ago, volcanic cone is fully eroded
> and
> the current hill is made of stones formed in the caldera of the volcano.
>
>
> Wdżar
> https://pl.wikipedia.org/wiki/Wd%C5%BCar
> https://www.openstreetmap.org/node/726504503/history
> There are volcanic rocks here, mountains looks like a volcanonic cone,
> called
> volcano by some for marketing purposes but there is no reason whatsoever to
> describe it as volcano.
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