03-01-2018 04:46 PM
I am using the sashelp.zipcode dataset to map zip codes to counties. That dataset contains just one observation per zip code. Does anyone know what algorithm SAS uses to select the county for zip codes that cross county lines? Population? Area? Centroid? Something else? Thanks for your help.
03-02-2018 11:54 AM
The file has the lat and the long for the centroid of the ZIP. I would assume that the county was determined off that centroid location, but I wouldn't know for sure. Just seems logical.