Victorian demographics: "poverty maps"

Our friend Cory Doctorow of BoingBoing writes:

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.")

Brick Lane is a bit different today - on the map it's black to represent the highest rates of crime, poverty and mortality. A commenter on the BoingBoing thread notes that essays on that area of East London are available online, and also that the maps themselves are on display at Bishopsgate Library.