The Grand Canyon map was the largest and most time-consuming relief map Tóth worked on during his 22 years at National Geographic. By his account, it took 1,074.5 hours to paint it.

Video produced by ASU Now.. Further Reading. Take a close-up look at historic maps of the Grand Canyon from ASU Libraries, the Library of Congress, and more.; Read about the history of charting the ...

It just got way, way easier to search and browse the US Geological Survey’s collection of historical topographic maps, thanks to a new online map viewer.These maps—more than 178,000 of them ...