This is a popular survey of all the things GPS and GIS make possible--municipal websites and their interactive maps of garbage pickup days, marketing via tapestry segmentation, tracking invasive species, self-driving cars and navigation loaded into your cell phone. The most interesting chapters are about the development of GPS as a government-funded military technology for navigation and its demonstrated utility for precision munitions in Kosovo and the Gulf War, and the first chapter, which offers the possibility that people, like the Polynesian long-distance navigators, have a capacity for direction and navigation untethered to Cartesian space or a GPS unit.