Through a friend at the University of Washington I received the following reply:
The Global Volcanism Program (GVP) that Steve pointed to you has the most consistently applied standard for classifying volcanoes around the globe. In that context, any volcano that has erupted in the Holocene [1] would be considered "active" -- which I know is confusing since no Cascade volcanoes are currently erupting or experiencing significant unrest. "Active" more speaks to whether the volcano could erupt again (and hence is still alive, or "active"), which is judged by whether it has erupted in the Holocene as well as whether there are signs of life (earthquakes under the volcano, degassing, deformation, etc.). The GVP also has a series of tags for things like primary volcano type, last known eruption, activity evidence, dominant rock type, etc. Having the GVP hyperlink volcano number would also allow users to see more detail about each volcano. I like the suggestion of having a link to GVP article. It's worth noting that we can not use the information contained in GVP articles because of licensing incompatibilities. GVP restricts use to non-commercial use and requires attribution. I have reached out to GVP to discuss linking to their database. My recommendation would be to not to expand volcano:status=active to as it is today. If we can link to the GVP database it would allow data consumers the ability to quickly gather the most recent information, much like the wikipedia/wikidata tags do today. [1] Holocene definition, for us non geologist, according to Wikipedia "The Holocene is the current geological epoch. It began approximately 11,650 cal years before present, after the last glacial period, which concluded with the Holocene glacial retreat." Best, Clifford On Mon, Jan 27, 2020 at 11:05 AM Mark Wagner <mark+...@carnildo.com> wrote: > On Mon, 27 Jan 2020 18:47:39 +1100 > Warin <61sundow...@gmail.com> wrote: > > > On 27/1/20 6:24 pm, John Willis via Tagging wrote: > > > I agree with you that this is the scale that volcanologists use, > > > but people want to draw a distinction between something that > > > erupted recently compared sometime in the last 200 years > > > > > > Perhaps it is easier to just apply the “active” and “Frequently > > > active” tags via this third-party data source, > > > > "frequently active " means what? > > > > If it erupted last year .. but not for 200 years before that I'd not > > call it 'frequent'. > > > > > > > but it would completely remove mapper’s ability to add a mountain > > > to this list via tagging. > > > > > > Possibly "last_eruption=" if that is what you want??? > > > > "last_eruption" isn't that useful for determining activity: the > majority of the world's volcanoes are cinder cones, which almost never > erupt twice or more. > > -- > Mark > > _______________________________________________ > Tagging mailing list > Tagging@openstreetmap.org > https://lists.openstreetmap.org/listinfo/tagging > -- @osm_washington www.snowandsnow.us OpenStreetMap: Maps with a human touch
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