Hard to believe, we have only now reached the 10th anniversary of Google Maps. As important as digital maps have become, their purpose is much the same as the printed and drawn maps that preceded them. Digital maps emerged in the 1960s with the Census Bureau’s DIME maps. These first digital maps were used for analysis of place-specific data, such as populations within census tracts or cities. Digital maps in turn led to geographic information systems (GIS) for spatial analysis. Though GIS had uses in fields like city planning, the main stimulus for digital maps came in the 1990s with the convergence of the completion of GPS infrastructure, and affordable and portable computers.