If there’s a capital of commercial mapmaking in the U.S. today, it’s probably in Silicon Valley. But from the late 19th century to the post-World War II era, Chicago was America’s city of maps. East Coast capitals like New York, Philadelphia, and Boston had led American mapmaking during the country’s first century, using European-derived techniques such as copper engraving, elaborate draftsmanship, and later, lithography. Two major lithographers, Henry Acheson and Edward Mendel, arrived in Chicago in 1853, securing the city’s mapmaking industry. See the full story and lots of maps from The Atlantic article by clicking here.