“The next significantly historical map was in 1507 and says ‘America’ on it,” Easton said. It is believed the Henricus Martellus map greatly influenced the 1507 map, but it was difficult to determine because the earlier map had faded.
“We went to Yale last year to image the map and Chet has been working on it ever since,” Easton said. “We took pictures under many colors of lights and you can use different combinations of the images under different lights to try to enhance the visibility of the things that have faded. He found all kinds of surprises,” including many words in Latin not visible to the eye.
The project also involved the University of Mississippi, MegaVision of Santa Barbara, Calif., and was sponsored by the National Endowment for the Humanities.