[Tagging] Hot springs

Richard Z. ricoz.osm at gmail.com
Thu Mar 6 10:44:49 UTC 2014

On Thu, Mar 06, 2014 at 01:15:13AM +0100, Peter Wendorff wrote:
> Hi Richard,
> Am 05.03.2014 21:50, schrieb Richard Z.:
> > On Wed, Mar 05, 2014 at 12:58:51PM -0600, John F. Eldredge wrote:
> >> I don't see anything in that definition that says the heat from within the earth has to be a minimum distance below the surface in order to be classed as geothermal. Volcanism is a subset of geothermal, where the hot material is particularly close to the surface.
> > 
> > sometimes it makes sense to distinguish whether something is identical or a subset
> > of something.
> That's true - but a very bad style for osm tagging, if you propose to
> use the superset's name (geothermal) for the superset MINUS the subset,
> so basically you propose to use the superset's name for a subset.
> Reminds me at the ugly natural=tree issue some time ago, where
> originally natural=tree referred to "outstanding", "landmark" or
> "important" trees, which lead to trouble when other mappers started to
> map "common" trees even in groups of trees or small "forests" one by one.
> By the way: is it volcanic if and only if it's breaking through the
> surface, or even in a geysir, or even where it's known to be some ten
> meters below the surface? Where it get's volcanic?
> Therefore I disagree about using geothermal for the subset not
> containing volcanic activity. Use deep-earth-heat or whatever term for a
> subset, or define a specialized subtag for the subsets (volcanic,
> ...(non-volcanic?), (others?)).

ok, well I was not proposing the use of a "geothermal" tag at any time. 
John wanted to know if there is a difference between "volcanic" and "geothermal",
and yes there is.

Aside of that I don't agree with your argumentation anyway. Why would 
I introduce a new term like deep-earth-heat when there are perfectly
accepted and widely used terms such as volcanic and geothermal?

Should use something like "tree-containing-area" to resolve the forrest 
vs. wood issues once for all times?


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