More on Lost medieval city found in Cambodia

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Airborne laser technology has uncovered a network of roadways and canals, illustrating a bustling ancient city linking Cambodia’s famed Angkor Wat temple complex.

More on Lost medieval city found in Cambodia
In this photo taken on June 28, 2012, Cambodia’s famed Angkor Wat temples complex stands in Siem Reap province, some 230 kilometers (143 miles) northwest Phnom Penh, Cambodia. Airborne laser technology has uncovered a network of roadways and canals, illustrating a bustling ancient city linking Cambodia’s Angkor Wat temples complex. The discovery was announced late Monday, June 17, 2013, in a peer-reviewed paper released early by the journal Proceedings of the National Academy of Sciences [Credit: AP/Heng Sinith]

The discovery was announced late Monday in a peer-reviewed paper released early by the journal Proceedings of the National Academy of Sciences. The laser scanning revealed a previously undocumented formally planned urban landscape integrating the 1,200-year-old temples.

The Angkor temple complex, Cambodia’s top tourist destination and one of Asia’s most famous landmarks, was constructed in the 12th century during the mighty Khmer empire. Angkor Wat is a point of deep pride for Cambodians, appearing on the national flag, and was named a UNESCO World Heritage Site.

Archaeologists had long suspected that the city of Mahendraparvata lay hidden beneath a canopy of dense vegetation atop Phnom Kulen mountain in Siem Reap province. But the airborne lasers produced the first detailed map of a vast cityscape, including highways and previously undiscovered temples.

“No one had ever mapped the city in any kind of detail before, and so it was a real revelation to see the city revealed in such clarity,” University of Sydney archaeologist Damian Evans, the study’s lead author, said by phone from Cambodia. “It’s really remarkable to see these traces of human activity still inscribed into the forest floor many, many centuries after the city ceased to function and was overgrown.”

The laser technology, known as lidar, works by firing laser pulses from an aircraft to the ground and measuring the distance to create a detailed, three-dimensional map of the area. It’s a useful tool for archaeologists because the lasers can penetrate thick vegetation and cover swaths of ground far faster than they could be analyzed on foot. Lidar has been used to explore other archaeological sites, such as Stonehenge.

In April 2012, researchers loaded the equipment onto a helicopter, which spent days crisscrossing the dense forests from 800 meters (2,600 feet) above the ground. A team of Australian and French archaeologists then confirmed the findings with an on-foot expedition through the jungle.

Archaeologists had already spent years doing ground research to map a 9-square-kilometer (3.5-square-mile) section of the city’s downtown area. But the lidar revealed the downtown was much more expansive – at least 35 square kilometers (14 square miles) – and more heavily populated than once believed.

“The real revelation is to find that the downtown area is densely inhabited, formally-planned and bigger than previously thought,” Evans said. “To see the extent of things we missed before has completely changed our understanding of how these cities were structured.”

Researchers don’t yet know why the civilization at Mahendraparvata collapsed. But Evans said one theory is that possible problems with the city’s water management system may have driven people out.

The next step for researchers involves excavating the site, which Evans hopes will reveal clues about how many people once lived there.

Author: Kristen Gelineau | Source: Associated Press [June 18, 2013]

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