The Light Detection and Ranging tool, known as LiDAR, is capable of penetrating the thick jungle vegetation at a rate of 560,000 dots per second, producing detailed images that mimic a 3-D view of the scanned areas.
"LiDAR uses laser pulses that bounce from the Earth's surface through leaves and back to a computer mounted in a plane," said Arlen Chase, an archaeologist at the University of Nevada, Las Vegas, who is working on the project. "While most people felt the technology would not be successful based on past experiments in Central America, we became convinced by 2006 that it could be used to determine what was on the ground in terms of Maya sites under the jungle canopy."
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Researchers with the Mirador Basin Project, which is led by archaeologist and anthropologist Richard D. Hansen of the University of Utah, have so far scanned and analyzed more than 430 square miles of the basin.
"The results were beyond our wildest expectations," Chase said.