In the case of Charlotte, North Carolina race is a differentiating charcateristic of residentail areas as shown in Map 3. Areas shaded in yellow have the lowest proportion of African Americans and areas shaded in brown have the highest proportion. Differentiation is common in American cities and Charlotte is no different in that respect. Social areas are also evident along other socio-economic dimensions. U.S. Census Summary Tape File and DDViewer .
Household income is another feature that distinguishes neighborhoods.
Continuing with the Charlotte example, Map 4 illustrates the distribution of households by income level. There are several features of this map that are noteworthy. First, as indicated by the brown portions of the map, higher income households generally tend to live further from the central city. Census tracts in yellow are the areas of lowest median income and are generally found closer to the central business district. Areas in orange and red are middle groups that are located in between.