[Tagging] Active volcanoes

Warin 61sundowner at gmail.com
Sun Jan 26 22:02:17 UTC 2020

On 27/1/20 1:32 am, Paul Allen wrote:
> On Fri, 24 Jan 2020 at 20:44, Kevin Kenny <kevin.b.kenny at gmail.com 
> <mailto:kevin.b.kenny at gmail.com>> wrote:
>     On Fri, Jan 24, 2020 at 2:38 PM Paul Allen <pla16021 at gmail.com
>     <mailto:pla16021 at gmail.com>> wrote:
>     > But "active" is too broad a term to be meaningful, I think.
>     Well, then, let's clarify the intention, narrow the definition, choose
>     a more appropriate keyword if necessary, wikify the narrowed
>     definition, and use that, rather than rejecting the idea out of hand.
> Good idea.  So I did some digging.  There are no scientifically-agreed
> definitions of the terms.  It's more of a folksonomy that scientists 
> sometimes
> use when talking to "folks."  See 
> https://en.wikipedia.org/wiki/Volcano#Volcanic_activity
> (it's fairly representative of other definitions I've found).  It's 
> messy.  There's a
> "it hasn't erupted in X years so it's dormant" definition in there, 
> but supervolcanoes
> like Yellowstone are excluded.  Iceland's volcanoes are very 
> interconnected.  Etc.
> About the only characteristic I've seen so far upon which there is broad
> agreement (and is verifiable by ordinary mappers) is the presence of a 
> lava
> lake (which many people probably think of when they see the term "active
> volcano").  That's mappable, in my opinion.

I would suggest using a constant tag to go along with what is being mapped.

If lava is visible then, perhaps, lava=yes... lava=visible???

I note that wikipedia says, lava is molten rock. So OSM may use the same 
definition to stay away from cooled lava that is no longer molten.

> If we can pin any other terms down more precisely, and show that 
> scientists agree
> with those definitions, and scientific literature that meets a general 
> scientific
> consensus is available classifying volcanoes in those terms, then I'm 
> all for it.
> -- 
> Paul
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