Tomasz Stepinski, a professor of geography at the University of Cincinnati, and his postdoctoral researcher Anna Dmowska who is now at Adam Mickiewicz University in Poznan, Poland, have produced a map of the United States that shows how the racial makeup of neighborhoods changed between 1990 and 2010. Users can zoom in to focus on a particular state, city, or even neighborhood. The maps are so detailed that information can be found for any 30-square-meter area in the country.
Professor Stepinski says that “people don’t realize that the United States is a diverse country but at the same time is still very segregated.”
An article about the project, “Comprehensive Framework for Visualizing and Analyzing Spatio-Temporal Dynamics of Racial Diversity in the Entire United States,” can be found here.
The map shows density but with no legend it is virtually impossible to determine what the colors mean. I can make an intelligent guess, but I would have preferred a map where the legend was available at the same time as the density measures.