[Tagging] Tagging natural or historic regions

[Christoph Hormann]

On Sunday 27 March 2016, David Marchal wrote:
> Hello, there.
> At least here, in France, there are numerous regions, whose unity is
> based either on a common historical background, for example as a
> medieval county or duchy like the Barrois, or on a uniform natural
> landscape, as the Bauges mountains or the Mont Blanc massif.

For mountain areas there has been some use of

place=region + region:type=mountain_area

Much of this data is however somewhat questionable due to lack of 
verifiability (exception being the Alps where there are fairly well 
established conventions of the boundaries of the subdivisions).

In principle infering approximate extents from mountain areas mapped as 
nodes based on relief data is often possible.

An alternative and possibly more specific and intuitive way of defining 
mountain areas could be mapping them as relations containing all peaks 
of these areas.

-- 
Christoph Hormann
http://www.imagico.de/