MACOMB, Ill. (AP) — Western Illinois University Professor Christopher Sutton teaches geography with a walkable map. Sutton introduced an interactive map of Illinois in a Distinguished Faculty Lecture at WIU last month. He’s used the 14-foot by 21-foot floor map in other lectures and visited schools. The map created by the Illinois Geographic Alliance is made of tarp material. Visitors can walk across it, finding cities, rivers and points of interest.