Get name of text file used by US Census Bureau with geographic information for American Community Survey. That geo file can be used to join data file(s) to FIPS/GEOID/NAME/SUMLEVEL/CKEY.
Usage
geofile(mystates, end.year = acsdefaultendyearhere_func())
Value
Character vector of file names, example: "g20215md.txt" Note this is only needed once per state, not once per seqfile. (It might even be available as a single US file?)
See also
get.acs()
and download.geo()
which uses this