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Posted by Luther on May 15, 2006, 2:39 pm
Please log in for more thread options thanks. It was not clear in the documentation (and still isn't, at least not
to me) that the zip codes used in the files are the same as the ZCTA's.
I'll keep an eye out.
> Luther-
>
> One thing to watch out for is that the Census doesn't use the official
> USPS zip code boundary definition; they use what they call "Zip Code
> Tabulation Areas." (working from memory so the definition of the
> acronym may be slightly off) They are generally analogous to USPS zip
> codes and accurate enough for many purposes, but they are "artificial"
> zip code boundaries designed for fitting data organized by Census areal
> units into non-Census zip code areal units.
>
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