In the age of MapQuest and GPS, we take cartographic literacy for granted. We should not; the ability to find meaning in maps is the fruit of a long process of exposure and instruction. A "carto-coded" America--a nation in which maps are pervasive and meaningful--had to be created. The Social Life of Maps tracks American cartography's spectacular rise to its unprecedented cultural influence. Between 1750 and 1860, maps did more than communicate geographic...