Hidden Secrets of 1491 World map Revealed Via Multispectral Imaging
Mike Cummings | June 12, 2015
Martellus' map arrived at Yale in 1962, the gift of an anonymous donor. Scholars at the time hailed the map's importance and argued that it could provide a missing link to the cartographic record at the dawn of the Age of Discovery. However, five centuries of fading and scuffing had rendered much of the map's text and other details illegible or invisible, limiting its research value.
<more at http://phys.org/news/2015-06-hidden-secrets-world-revealed-multispectral.html; related link http://www.spectralcameras.com/spectralcamerasupport (What Is Multispectral Imaging?)>
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