There are many different "lenses" that you can use when looking at the history of a city's culture. For example, you can look at Detroit's history through music, or food, or art. But a lens that people often overlook is cartography -- in other words, looking at Detroit through maps.  Alex B. Hill is the Geographic Information Systems Director at Wayne State University and the Project Director of the Detroit Food Map Initiative. He joins Seth and Becky to talk about what unconventional maps can tell us about Detroit.