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San Diego, Calif., Feb. 6, 2018 -- "Lost Treasures of the Maya Snake Kings," a new one-hour National Geographic special premiering Feb. 6 at 9/8 p.m. central, shows how LiDAR laser imaging technology is revolutionizing archaeology and features the WAVE data visualization technology created by researchers at the University of California San Diego. Albert Yu-Min Lin, who earned a Ph.D. at the Jacobs School of Engineering at UC San Diego, hosts the program.
The effort brought together engineers from the departments of computer science, structural engineering and electrical and computer engineering, as well as the Qualcomm Institute at UC San Diego.
The documentary explores what’s being hailed as a “major breakthrough” in Maya archaeology: the identification of ruins of more than 60,000 houses, palaces, elevated highways, and other human-made features that have been hidden for centuries under the jungles of northern Guatemala. The work was conducted by researchers of the PACUNAM LiDAR initiative.
Using a powerful technology known as LiDAR (short for “Light Detection And Ranging”), scholars digitally removed the tree canopy from aerial images of the now-unpopulated landscape, revealing the ruins of a sprawling pre-Columbian civilization that was far more complex and interconnected than most Maya specialists had supposed.
“The LiDAR images make it clear that this entire region was a settlement system whose scale and population density had been grossly underestimated,” said Thomas Garrison, an Ithaca College archaeologist and National Geographic Explorer who specializes in using digital technology for archaeological research.
Garrison is part of a consortium of researchers who are participating in the project, which was spearheaded by the PACUNAM Foundation, a Guatemalan nonprofit that fosters scientific research, sustainable development, and cultural heritage preservation.
Working closely with National Geographic Explorers, QI’s Cultural Heritage Engineering Initiative (CHEI) was launched in 2007 and has since created a comprehensive toolbox and talent pool that brings the power of student-driven science and engineering to the study and preservation of archaeological sites, monuments, historic structures and other artifacts. Researchers have a history of working on various ground based and drone based LiDAR imaging projects in Guatemala. Lin, along with his collaborators in the Engineers for Exploration program —co-directors Ryan Kastner, a professor in computer science, and Curt Schurgers, a professor in electrical and computer engineering— collaborated with Garrison to lead teams of students on expeditions over the past four years to the jungles of Guatemala to test out various platforms for mapping and imaging. Staff Engineer Eric Lo, also a Jacobs School alumnus, and computer science Ph.D. student Dominique Meyer were also instrumental in these field expeditions.
|Researchers examine LiDAR imagery from Guatemala on two of the visualization displays (including the WAVE, at right) in the lab of the QI Cultural Heritage Engineering Initiative.|
“Engineering and exploration go hand in hand — National Geographic was co-founded by the Alexander Graham Bell who invented the telephone,” said Lin. “The things we create allow us to go further, and with the exponential rate of innovation today this truly is the new golden age of exploration.”
The Qualcomm Institute is a leader in visualization technologies that make it possible to look at data at a massive scale. Researchers at CHEI — including Falko Kuester, Vid Petrovic, Lo, Christopher McFarland, Jurgen Schulze, Greg Dawe, Joel Polizzi, Joe Keefe and Tom DeFanti — played a primary role in developing CHEI’s hardware and software toolbox, including the 70-megapixel Wide Angle Virtual Environment (WAVE), which is featured heavily in the documentary. The team at CHEI also developed the VisCore visual analytics engine that allows archaeologists to use virtual reality to literally walk into the arena of data-enabled scientific discovery, as featured in the "Lost Treasures of the Maya Snake Kings."
“Turning big-data into insights and action is one of the truly transformative elements that our team enables,” says CHEI Director Kuester, who is a professor in the Department of Structural Engineering at the Jacobs School. “Lots of data is being acquired and simulated these days, but making sense of it all is a completely different story. The opportunity to work in highly interdisciplinary teams that change to state of knowledge is where it gets truly exciting.”
An advanced civilization
The PACUNAM project mapped more than 800 square miles (2,100 square kilometers) of the Maya Biosphere Reserve in the Petén region of Guatemala, producing the largest LiDAR data set ever obtained for archaeological research.
The results suggest that Central America supported an advanced civilization that was, at its peak some 1,200 years ago, more comparable to sophisticated cultures such as ancient Greece or China than to the scattered and sparsely populated city states that ground-based research had long suggested.
In addition to hundreds of previously unknown structures, the LiDAR images show raised highways connecting urban centers and quarries. Complex irrigation and terracing systems supported intensive agriculture capable of feeding masses of workers who dramatically reshaped the landscape.
The ancient Maya never used the wheel or beasts of burden, yet “this was a civilization that was literally moving mountains,” said Marcello Canuto, a Tulane University archaeologist and National Geographic Explorer who participated in the project.
“We’ve had this western conceit that complex civilizations can’t flourish in the tropics, that the tropics are where civilizations go to die,” said Canuto, who conducts archaeological research at a Guatemalan site known as La Corona. “But with the new LiDAR-based evidence from Central America and [Cambodia’s] Angkor Wat, we now have to consider that complex societies may have formed in the tropics and made their way outward from there.”
“LiDAR is revolutionizing archaeology the way the Hubble Space Telescope revolutionized astronomy,” said Francisco Estrada-Belli, a Tulane University archaeologist and National Geographic Explorer. “We’ll need 100 years to go through all [the data] and really understand what we’re seeing.”
Already, though, the survey has yielded surprising insights into settlement patterns, inter-urban connectivity, and militarization in the Maya Lowlands. At its peak in the Maya classic period (approximately A.D. 250–900), the civilization covered an area about twice the size of medieval England, but it was far more densely populated.
“Most people had been comfortable with population estimates of around 5 million,” said Estrada-Belli, who directs a multi-disciplinary archaeological project at Holmul, Guatemala. “With this new data it’s no longer unreasonable to think that there were 10 to 15 million people there—including many living in low-lying, swampy areas that many of us had thought uninhabitable.”
Virtually all the Mayan cities were connected by causeways wide enough to suggest that they were heavily trafficked and used for trade and other forms of regional interaction. These highways were elevated to allow easy passage even during rainy seasons. In a part of the world where there is usually too much or too little precipitation, the flow of water was meticulously planned and controlled via canals, dikes, and reservoirs.
Among the most surprising findings was the ubiquity of defensive walls, ramparts, terraces, and fortresses. “Warfare wasn’t only happening toward the end of the civilization,” said Garrison. “It was large-scale and systematic, and it endured over many years.”
The survey also revealed thousands of pits dug by modern-day looters. “Many of these new sites are only new to us; they are not new to looters,” said Marianne Hernandez, president of the PACUNAM Foundation. (Read "Losing Maya Heritage to Looters.")
Environmental degradation is another concern. Guatemala is losing more than 10 percent of its forests annually, and habitat loss has accelerated along its border with Mexico as trespassers burn and clear land for agriculture and human settlement.
“By identifying these sites and helping to understand who these ancient people were, we hope to raise awareness of the value of protecting these places,” Hernandez said.
The survey is the first phase of the PACUNAM LiDAR Initiative, a three-year project that will eventually map more than 5,000 square miles (14,000 square kilometers) of Guatemala’s lowlands, part of a pre-Columbian settlement system that extended north to the Gulf of Mexico.
“The ambition and the impact of this project is just incredible,” said Kathryn Reese-Taylor, a University of Calgary archaeologist and Maya specialist who was not associated with the PACUNAM survey. “After decades of combing through the forests, no archaeologists had stumbled across these sites. More importantly, we never had the big picture that this data set gives us. It really pulls back the veil and helps us see the civilization as the ancient Maya saw it.”