On 8/30/13 6:12 PM, John F. Eldredge wrote:
You may want to double-check with the Post Office, to find out whether
there is the possibility that there may legitimately be outliers in
some cases. I don't think the US Post Office guarantees that zip codes
will always define a single polygon with
On Fri, Aug 30, 2013 at 2:13 PM, Eric Fischer e...@pobox.com wrote:
Or if you just want the US zip code polygons and don't care if you get
them from OSM or somewhere else, you could just download the shapefile of
Census Zip Code Tabulation Areas from
On Fri, Aug 30, 2013 at 3:12 PM, John F. Eldredge j...@jfeldredge.comwrote:
You may want to double-check with the Post Office, to find out whether
there is the possibility that there may legitimately be outliers in some
cases. I don't think the US Post Office guarantees that zip codes will
If you are looking for the correct ZIP code by address you should acquire
the USPS ZIP4 product
https://ribbs.usps.gov/addressing/documents/tech_guides/pubs/AIS.PDF
The Census ZCTA5 data is pretty good to help determine the predominant ZIP
code in areas. It misses singleton addresses but you can
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