National Geographic : 2015 Jul
Anacostia WASHINGTON, D.C. WASHINGTON, D.C. THE WHITE HOUSE U.S . CAPITOL THE WHITE HOUSE U.S. CAPITOL Rock Creek Park ROCK CREEK PARK PotomacAnacostia RYAN MORRIS, NGM STAFF; DUSTIN A. CABLE, WELDON COOPER CENTER FOR PUBLIC SERVICE, UNIVERSITY OF VIRGINIA. SOURCE: NATIONAL HISTORICAL GEOGRAPHIC INFORMATION SYSTEM Every ten years the U.S . census produces a mountain of data. Now demographers at the University of Virginia have brought those findings to life. They devised a map assigning a single dot to each person counted in the census. Plotting 300 million dots across the U.S. reveals major population cen- ters. Coloring dots based on race and ethnicity shows how cities (such as Washington, D.C.) often divide themselves. “We didn’t expect to still see such segregation in some parts of the country,” says Qian Cai, chief demographer at UVA’s Weldon Cooper Center. Data from past censuses add an extra dimension, showing how places have changed over time. —Daniel Stone White 26% Black 32% CHANGE 1980-2010 Hispanic 208% SHIFTING DEMOGRAPHICS Population of Washington, D.C . 1980-2010 (in thousands) Asian 228% Other 510% 0 100 ’80 ’90 ’00 ’10 200 300 400 Dot Topic Us EXPLORE White Black Asian Hispanic Other MORE DIVERSE, BUT STILL DIVIDED One dot equals one person in 2010, mapped by census block.