Racial/ethnic maps of American cities

Eric Fischer has a remarkable Flickr set of over a hundred city maps which plot population according to race and/or ethnicity:  "Red is White, Blue is Black, Green is Asian, Orange is Hispanic, Gray is Other, and each dot is 25 people. Data from Census 2000."

Pictured above are Minneapolis/St. Paul, Minnesota and Madison, Wisconsin.  

Via Sociological Images.