Machine learning has uncovered previously hidden 'Nasca lines ' geoglyphs etched into Peruvian desert 2,400 years ago.
Being more than a thousand years old, erosion has obscured many of the geoglyphs, making high-altitude aerial surveying a challenging process. That's where Masato Sakai, a professor of anthropology and archaeology at Yamagata University in Japan , comes in.
"To address this issue, we divided the known geoglyphs into relatively simple pictorial elements and used them as training data to create an object detection model," Sakai continued. "We hypothesized that there would be similar elements in new geoglyphs and the method may improve the generalization performance by focusing on capturing these elements rather than the entirety of geoglyphs.
The method seems to be working, helping Sakai and colleagues identify four previously undiscovered Nasca lines depicting a humanoid, a pair of legs, a fish, and a bird, which were then verified by an on-site inspection by archaeologists. The findings were detailed in the most recent issue of the
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