On my recent visit to the Newberry Library, I walked into the Hermon Dunlap Smith Center for the History of Cartography. It was not clear whether the public is welcome there but the room was unlocked. On a large table under glass was a copy of A Map of Chicago's Gangland from Authentic Sources. This is a tounge-in-cheek map from 1931 "designed to inculcate the most important principles of piety and virtue in young persons and graphically portray the evil and sin of large cities."
Encyclopedia of Chicago.
Note the cartographic and cultural differences between a 1931 gangster map and the current map.
3 years ago