On 27/1/20 1:32 am, Paul Allen wrote:
On Fri, 24 Jan 2020 at 20:44, Kevin Kenny <kevin.b.ke...@gmail.com
<mailto:kevin.b.ke...@gmail.com>> wrote:
On Fri, Jan 24, 2020 at 2:38 PM Paul Allen <pla16...@gmail.com
<mailto:pla16...@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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