Map 1. Racial Mix of Block Groups in the ...

In order to show the concentration of the population, density maps are provided for 3 categories: integrated block groups with at least 20 percent black population and at least 20 percent white population, block groups that are over 80 percent black, and block groups that are over 80 percent white. These maps show the concentration of population based on density per square mile. As a result, urban neighborhoods with highest concentrations of residents (in integrated, predominantly black, or predominantly white block groups) are tallest in the 3-D maps presented, while sparsely populated areas appear flat. Note Block groups are excluded where the institutionalized population makes up more than a third of the total population or where the block group population totals less than 50 people. Some metropolitan areas have residents living on black-white integrated blocks but have no block groups meeting the black-white integration criteria. Likewise, some metro areas, particularly those with large Latino and Asian populations, may show no blocks groups where the population is over 80 percent black or over 80 percent white.