Robert Berlo got hooked on maps at an early age. As a kid growing up in San Francisco he’d pore over roadmaps in the backseat of the car on family vacations. Sometime around age 11 he started collecting them.
By the time Berlo died in 2012 at 71 he’d amassed more than 12,000 roadmaps and atlases. But he did more than covet and collect them. Over the decades, Berlo spent countless hours mining his maps for data, creating tables, charts, graphs, and still more maps on everything from transportation systems to the population history of small towns. Now, Berlo’s collection is getting another life as a repository of previously hidden information.