Every decade the US Census Bureau releases a dataset called “TIGER” that includes what it calls “ZIP Code Tabulation Areas” or ZCTAs.  As the Census Bureau itself admits, ZCTAs are not ZIP Codes. They are simply areas to help the Census staff go out and collect/analyze census information. “There is no correlation between U.S. Postal Service ZIP Codes and U.S. Census …
Continue Reading: ZCTAs are not ZIP Codes

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