Through a series of maps, Eric Fisher has painted a sobering picture of residential segregation in more than one hundred US metropolitan areas.  The maps are based on population data from the 2010 US Census Bureau reports.  Each dot represents 25 residents, color-coded by race: red is White, blue is Black, green is Asian, orange is Hispanic, yellow is Other.

Fisher credits Bill Rankin's map of Chicago: http://www.radicalcartography.net/index.html?chicagodots as the inspiration for his project.

Chicago, IL

Detroit, MI

Los Angeles, CA

Miami, FL

St. Louis, MO

As noted in Vox, "[w]hat's really striking about these maps [...] is that even though the color patterns change — some cities have many more Asians or Latinos than St. Louis — the basic impression of highly segregated lives does not."

You can see all of Fisher's maps by browsing through his flickr album "Race and Ethnicity 2010": https://www.flickr.com/photos/walkingsf/sets/72157626354149574/

Read more:
https://www.flickr.com/photos/walkingsf/sets/72157626354149574
http://www.radicalcartography.net/index.html?chicagodots
http://www.vox.com/2015/1/20/7547159/real-state-of-the-union-maps-and-charts

TeachingwithData.org resources:
Parable of the Polygons (http://www.teachingwithdata.org/resource/3932)
White/Black Racial Segregation in U.S. Cities (http://www.teachingwithdata.org/resource/3163)
Investigating Exploring Race and Ethnicity Using Census 2000 Data (http://www.teachingwithdata.org/resource/3176)