I’ve a question about your metropol regions (especially) Amsterdam. It’s already discussed here and here.
We’ve using nominatim for a location based game to get an hierarchical structure of regions. Now, in the Netherlands, especially the Amsterdam region it becomes a bit confusing, cause a low level area belongs to multiple upper area regions. That’s unusual and unlogic for me and also not documented in the osm wiki. Also I’m not sure if the MRA is an administrative region (even it has an administrative bureau).
After checking the webpages it’s more looking like an economical region (which nominatim would ignore).
Also in the German discussion they told me, that putting subareas into relations is a bad behavior. From the logical point its strange for me to have lvl 4 and lvl 6 regions als “childs” of an lvl 7…
So lets see if you can make this construct a bit more clear for the orderly Germans ^^ (and also for algorithms)
The Metropoolregio Amsterdam (MRA) is a cooperative body (as in they work together). It’s members are:
the VRA (Transport Authority Amsterdam)
The MRA is labeled on it’s website as an “office”, so it seems to have no administrative power.
It is a cooperative and coordinating body. Just a “round table” so it seems. It has threee platforms: [Space and zoning], mobility, economy.
But as a highly urbanized metropolitan area, it is sometimes used for marketing and statistical reasons.
A similar body exists in the southern part of the Randstad, the Zuidvleugel (southern wing) (The MRA was previously known as northern wing).
Those are not to be confused with bodies such as for Amsterdam the VRA (Vervoersregio Amsterdam, formerly known as SRA - Stadsregio Amsterdam), which has administrative powers, mainly on regional and public transport. The MRDH (Metropoolregio Rotterdam Den Haag) is another such example.
But the VRA is just an administrative entity it’s member municipalities and provinces have delegated some of their powers to. It is not an administative region in the municipality-province-state hierarchy. It is also not a democratic entity.
I’m more and more of the opinion that we shouldn’t have any boundaries other than the kingdom, countries, provinces, municipalities & cities in OSM. All other boundaries should be removed and people interested in those should use their own system for them. Nature reserves/protected areas are probably fine to keep.