On Thu, Aug 11, 2016 at 9:54 AM, BenoƮt Barteaux <witoom...@gmail.com> wrote:
> Actually Frank has got a point. We could use a specialization approach and > add postal codes on cityes that support this scheme (France, Spain). Then, > for cities that don't use this scheme (as you said CA, US, UK), we can add > single postal codes to POI until the post gives us the rights to import the > zones. Obligatory mention that US ZIP codes come in 2 varieties, only the version nobody uses is open: - Census zip codes that roughly and very loosely describe vague areas (plus a *huge* number of completely weird ones nobody would recognize where the Postal Service does *not* deliver), and these are open. - Postal service 9-digit (aka "ZIP+4") variety that describes a specific postal route and group of destinations (usually no more than ~10-12; the trailer park I lived in had *14* zip+4s for a single multitenant property despite all ~240 mailboxes being on the same street corner), not areas. These are proprietary and the only ZIP you'll find in addresses.
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