I want to make sure that the zip-code areas that are covered in IMPLAN are the Bureau of Census Zip-Code Tabulation Areas (ZCTA). I can find a census site that displays the physical location of each of the ZCTAs but I cannot seem to find an IMPLAN map that shows the physical location of zip-codes for each state or county. From the census: https://tigerweb.geo.census.gov/tigerweb/ I also found one thread from this forum that seems to confirm that you use the ZCTA: "Our raw data usually are collected and reported according to ZCTAs, which generally map 1:1, but not always perfectly, with USPS zip codes. Sometimes, though, the data are reported by a zip code that might be for a particular..." http://support.implan.com/index.php?option=com_kunena&view=search&q=Zip%20code%20map&childforums=1&Itemid=1848 Can you confirm that if I build a contiguous section of zip-codes using the ZCTA in Gila and Penal Counties in Arizona it will be the same physical area in IMPLAN? Thanks, Donovan
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  • Hi Donovan! The zip code data for households, population, and land area are collected and tabulated according to Census ZCTAs (zip code tabulation areas). The employment by industry data (cbp/zbp) are tabulated according to postal service zip codes. They’re meant to coincide, so we treat them interchangeably, but there can be some divergence. In regards to situations where a zip code crosses county lines: We generally tend to follow the zcta-county relationship file here, and primarily rely on the distribution of population: https://www.census.gov/geo/maps-data/data/zcta_rel_download.html In regards to a map: In order to determine a larger consensus, we do utilize a few sources when questions of zip code geography arise; however, only one is an actual map (the first link below). http://maps.huge.info/zip.htm https://www.zip-codes.com/search.asp https://tools.usps.com/go/ZipLookupAction!input.action
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