Here’s a diagram of what redlining in St. Louis looked like in 1935-1940. The areas are color coded by desirability, and were used to segregate people by basing the loans given out on the color coding seen here. Based on these maps, it’s easy to see how certain neighborhoods were set up to decline. It also appears to have been based on the age of the housing stock, as older housing was the least desirable during the urban renewal period, and the system was set up so that minorities could only buy in the red areas.
