Charles Booth’s groundbreaking “Poverty Maps” of London from 1886 to 1903 used survey data to visually represent the quality of life for Londoners across a city that was characterized by enormous economic disparity. The LSE maintains an archive of the maps, zoomable and overlaid with the contemporary London map. The maps are colored from black (“Lowest class. Vicious, semi-criminal.”) to yellow (“Upper-middle and Upper classes. Wealthy.”)