Digital maps, which tend to be centered on users rather than places, are changing the way we view the world, writes Simon Garfield, author of "On The Map: Why the World Looks The Way It Does." "It is quite possible to walk, phones in our palms, from one end of a city to another without looking up," he writes. "... In our cars, GPS may guide us quite merrily from one country to another, and we may arrive at our destination without any idea of how we got there."