Hi Robert,
On 2014-02-20 20:17, Robert Whittaker (OSM lists) wrote: > On 20 February 2014 11:34, Colin Smale <[email protected]> wrote: > >> one thing I noticed is that there are two schools of thought regarding >> Metropolitan Districts. These are a subdivision of Metropolitan Counties, of >> which there are six: Greater Manchester, Merseyside, South Yorkshire, Tyne >> and Wear, West Midlands and West Yorkshire. > >> I would like to normalise this tagging, and looking at the current usage >> above and the wiki[1], propose that the Metropolitan Counties become >> boundary=ceremonial, and the Metropolitan Districts become >> boundary=administrative, admin_level=8. > > If the "Metropolitan Districts" have essentially the same > administrative powers/functions as a unitary authority, then I think > they should be tagged with the same admin_level (i.e. 6) to reflect > that fact. We'd then be consistently using admin_level=6 for the > highest tier of local government. If they are slighty different (i.e. > some powers rest elsewhere) then maybe we could consider using > admin_level=7 instead. As far as I can tell, they're definitely not > similar to the district councils under a normal county council, so iI > think it would be better to avoid using admin_level=8. Sounds reasonable to me. They are missing various powers of a true UA, which are organised at a "Metropolitan County" level in "joint boards". So admin_level=7 would reflect that intermediate level. > Ceremonial counties are a completely separate division of the country into > Lord Lieutenancy areas -- see > http://en.wikipedia.org/wiki/Ceremonial_counties_of_England [1] . So in OSM > I'd expect to find these in existence over the whole country, not just for > the Metropolitan Counties. Since they have no administrative local-government > function, I wouldn't expect them to need or have an admin_level tag. > Sometimes they'll be coterminous with a normal county (i.e. the area > controlled by a County Council). In which case, I'd expect to see two > different relations in OSM, one for each entity. That is how lieutenancies/ceremonial counties are currently tagged - boundary=ceremonial, no admin_level. Indeed, if coterminous with an administrative county, then two relations are needed. I believe many already exist like this. See: http://wiki.openstreetmap.org/wiki/English_Counties (which I have tried to keep up-to-date) for an overview. It looks like there are still a few missing - I will work on that. > To further complicate things, it seems that in a relatively recent > development, there is now a "Greater Manchester Statutory City Region" with a > "Greater Manchester Combined Authority" that does have some significant > administrative functions. See > http://en.wikipedia.org/wiki/Greater_Manchester_Statutory_City_Region [2] . > This region is coterminous with the Greater Manchester Ceremonial County, but > is a different entity. As above, I'd expect the two identical boundaries to > have separate OSM relations. One with boundary=ceremonial and no admin_level > tag, and the other with boundary=administrative and an appropriate > admin_level. The admin_level value needs to be greater than 5 (English > Regions) and less than the value we've used for the individual borough/city > areas. So presumably we wouldn't be able to use admin_level=6 for the > "Metropolitan Districts" within Greater Manchester, so 6 can be used by the > "Combined Authority". Hmm, I didn't realise that... Wikipedia suggests it may be modelled on the Greater London Authority, which limited, well-defined powers. There doesn't seem to be a relation for the GLA - but there is one (65606) at admin_level=6 called "London". > Whether we should use 7 rather than 8 for the "Metropolitan Districts" would, > I think, depend on how much their powers/responsibility are similar to a > normal districts within a normal county, and how much they retain more of the > character of a Unitary Authority or other "Metropolitan Districts". Robert. Colin Links: ------ [1] http://en.wikipedia.org/wiki/Ceremonial_counties_of_England [2] http://en.wikipedia.org/wiki/Greater_Manchester_Statutory_City_Region
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