The Map Geeks Behind 'Bostonography'

In this age of Google Maps and GPS in cell phones, hasn’t everything already been mapped?

“It’s probably the most common question a cartographer gets,” says Tim Wallace, who’s finishing his Ph.D. at the University of Wisconsin, Madison’s cartography program. “Yeah, spatially, most of the world, above water anyway, has been surveyed. But certainly not every phenomenon has been mapped.”