This polygon datalayer depicts the metropolitan statistical areas with associated attribute data for the Atlanta Regional Commission's (ARC) 10-county region. This layer includes an additional 10 counties.
ARC documentation states that:
This Theme was derived from The State of Georgia CountiesTheme (GACOUNTY) which is based on U.S. Census Bureau census tracts. The geographic extent of this Theme is the 20-county Metropolitan Statistical Area (MSA) for the Atlanta Region which includes ARC's 10 counties plus the counties of Pickens, Bartow, Forsyth, Barrow, Paulding, Walton, Carroll, Newton, Coweta, and Spalding.