[Talk-us] CDPs and admin_level

Greg Troxel gdt at ir.bbn.com
Mon Oct 12 16:49:46 BST 2009

Anthony <osm at inbox.org> writes:

>> I believe that in Mass
>> lot lines can straddle town boundaries - but I'm not 100% sure.
> However, now we're getting back on topic.  Is that disallowed?
> Remember, these tags are placed on the borders, not the regions (which
> would typically be boundary relations), and remember that only the
> highest border is tagged.  So if a single lot straddles two towns,
> that would be mapped with exactly the same borders as if there were
> two lots.  The only difference would be in the boundary/multipolygon
> relation(s), which is not where admin_level is tagged.

My computer-science-impaired mind wants boundary=administrative
admin_level=N+1 not to cross boundary=administrative admin_level=k for
any k <= N.

>> They are definitely not political boundaries though.
> I guess, though it's hard for me to come up with an objective
> definition of "political boundaries" which includes all the current
> uses and yet excludes this one.

When you cross a political boundary the government changes somehow.  I
agree this gets hard/fuzzy and there may be no need to resolve it.
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