[Tagging] Hot springs
ricoz.osm at gmail.com
Wed Mar 5 11:36:15 UTC 2014
On Wed, Mar 05, 2014 at 11:01:50AM +0100, Peter Wendorff wrote:
> Aren't volcanos exactly what geothermal refers to, only near or at the
> surface instead of deep down in the earth?
apparently not, I can only direct you to the wikipedia article:
> IMHO geothermal refers to "using the thermal energy (aka heat) of the
> earth", which of course in general is higher if you go deeper down, but
> the temperature per depth is variable, and at a volcano you just get
> high temperature even in low depths, but that's all.
yes but it is a difference. If we can do better we should not introduce
new tags only to use them incorrectly afterwards.
* hot_spring would catch everything that is called hot_spring, I am still thinking about geysirs.
* geothermal would not apply for many south Italian hot springs, Methana (Greece) and Yellowstone
( http://pubs.usgs.gov/fs/2005/3024/, http://en.wikipedia.org/wiki/Grand_Prismatic_Spring )
Now consider the definitions in wikipedia
** wikipedia-de: above 20°C ("Gemäß den Begriffsbestimmungen werden in Deutschland Grundwässer als Thermalwasser bezeichnet, wenn ihre Temperatur am Austrittsort mehr als 20 °C beträgt")
*** a spring with water temperatures above its surroundings
*** a natural spring with water temperature above body temperature – normally between 36.5 and 37.5 °C (97.7 and 99.5 °F)
*** a natural spring with warm water above body temperature
*** a thermal spring with water warmer than 36.7 °C (98 °F)
*** a natural spring of water greater than 21.1 °C (70 °F) (synonymous with thermal spring)
*** a natural discharge of groundwater with elevated temperatures
*** a type of thermal spring in which hot water is brought to the surface. The water temperature of a hot spring is usually 6.5 °C (12 °F) or more above mean air temperature. Note that by this definition, "thermal spring" is not synonymous with the term "hot spring"
*** a spring whose hot water is brought to the surface (synonymous with a thermal spring). The water temperature of the spring is usually 8.3 °C (15 °F) or more above the mean air temperature.
*** a spring with water above the core human body temperature – 36.7 °C (98 °F).
*** a spring with water above average ambient ground temperature, a definition favored by some
*** a spring with water temperatures above 50 °C (122 °F)
I would not want to go as far as fixing wikipedia before making a definitionin OSM
So my conclusion - using the locally accepted classification is the only usable
definition of hot springs.
More information about the Tagging