topic County selection in sashelp.zipcode dataset in SAS Programming

County selection in sashelp.zipcode dataset

SDally — Thu, 01 Mar 2018 21:46:31 GMT

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.

Re: County selection in sashelp.zipcode dataset

HB — Fri, 02 Mar 2018 16:54:27 GMT

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.

Re: County selection in sashelp.zipcode dataset

SDally — Wed, 07 Mar 2018 01:16:50 GMT

Thanks for your reply, HB. I agree that centroid seems logical, but I would love to see some documentation that says so for sure.