[Tagging] boundary relations and the subarea property

[Colin Smale]

Re: Belgium: I thought at first that the Official Language could be a
simple attribute (French, Flemish, French/Flemish bilingual, or German)
of a municipality, but I read on Wikipedia that there are actually
parliaments for the language communities, which do not exactly coincide
with the three Regions. And these parliaments/community governments
actually seem to have roles and power. There are therefore two
orthogonal hierarchies at work, one is the regional structure, and the
other is the community structure. 

I don't know for sure how it works in other multilingual countries like
Switzerland. I think the "official language" is an attribute of the
canton, with some being bilingual or trilingual, but that is not
actually an orthogonal layer of government like it is in Belgium. 

In the UK the "ceremonial counties" are kept out of the
boundary=administrative hierarchy. They are tagged as
boundary=ceremonial and have their own relations, even if they are
coterminous with administrative counties. When administrative boundaries
change, a separate process has to take place to change the boundary of
the lieutenancy areas (official name for ceremonial counties). This is
(in theory anyway) not mandatory, and may not happen at the same moment.


--colin 

On 2015-11-27 15:27, André Pirard wrote: 

> On 2015-11-27 10:06, Martin Koppenhoefer wrote : 
> 
> 2015-11-26 21:12 GMT+01:00 André Pirard <a.pirard.papou at gmail.com>:
> It is even mandatory when you have to make nested boundaries that have no admin_level like the two boundary systems we have in Belgium (political and linguistic). 
> can you give an example how this is modeled, e.g. a relation in osm? Having 2 kind of different boundary systems at first glance seems to be best modeled with 2 kind of boundary types in OSM.

????

The boundary system we have in Belgium (that you mention).
Any other language partitioning of a country.
The ceremonial counties case.
...

Cheers 

 		André.

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