Ezt írják:

"All of the data displayed on the map are from the 2010 Summary File 1 (SF1) tables from the U.S. Census Bureau. Table P5, "Hispanic or Latino Origin by Race," was merged with block-level state shapefiles from the National Historical Geographic Information System. Five racial categories were created based on the data in table P5: non-Hispanic White, non-Hispanic Black, non-Hispanic Asian, Hispanic or Latino, and a category for all other racial categories including the multiracial identifications. The sum of all five categories equals the total population."