After the long French and Indian War, British surveyors fanned out to create maps of their new frontier territories so they could better control the unruly colonists. Max Edelson is author of The New Map of Empire. Plus: A spin through early American Cartographic History by Cassandra Farrell. She describes one map created by Captain John Smith and another by the father of Thomas Jefferson.

Later in the show: When Johnny Finn's urban planning students arrive at the campus they often warn each other to stay away from the number streets in the nearby city because those are dangerous. Finn says the "number streets" represent a century of deliberate segregation and redlining that have cost African American middle-class families across America billions in lost wealth.