Depending on your workflow, this may make ZCTAs inappropriate for further use. I've found significant differences between ZIP codes (from geocoded addresses) and ZCTAs, especially in areas with uneven distribution of postal mail, like dense urban centers, commercial and industrial parks, and very rural areas. The ZIP Code Tabulation Areas (ZCTAs) are a best-estimate made by the Census Bureau about the spatial delineation of ZIP codes, reverse-engineered from responses to the Bureau's surveys. Many post offices also have a separate ZIP code just for their P.O.
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GOOGLE EXPRESS ZIP CODE PDF
WinZip PDF Express: convert, combine, protect, and export. Unzip over 17 file formats plus get more done with the NEW WinZip® Pro Apps. If an address receives enough mail, the USPS will just assign them a ZIP code to improve sorting efficiency. Welcome to your one-stop file management and compression software. ZIP codes are a system used by the Postal Service for sorting mail before delivery, and nothing more.
One of the biggest misconceptions GIS users have about ZIP codes is that they are a set of polygons that cover the United States-they are not.
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