Metropolitan boundary definitions in DiversityData are defined as of which year?
The Office of Management and Budget revises metropolitan area boundary definitions after each decennial census to take into effect changes in population and commuting patterns. In addition, smaller changes are made throughout the decade. DiversityData currently utilizes metropolitan area boundaries defined as of 1999, because much of the data presented here are drawn from the 2000 Decennial Census or other data sources that use those metro area definitions. In the future we hope to revise the website to make it possible for users to specify either this older definition or one defined after the 2000 Decennial Census.
