NBC News - 6/18/13, By Alan Boyle, Science Editor
A map of northwest Cambodia provides an overview of the areas where lidar imagery was acquired, indicated with yellow shading. The background data is from NASA's Shuttle Radar Topography Mission. Evans et al. / PNAS
Lidar imagery shows the central area of Angkor, with the "walled city" of Angkor Thom above Angkor Wat. Red lines indicate post-medieval features, including roads and canals. The other features are from the Angkor era. Evans et al. / PNAS
Laser-scanning technology reveals that the Cambodian lost city of Mahendraparvata, dating back to a time before Angkor Wat, was much more extensive than previously thought. The latest word about the high-tech hunt for hidden ruins came over the weekend in an on-the-scene report from Australia's Fairfax Media.
A Cambodian tourism documentary provides scenes from the Mahendraparvata archaeological site.
"We're talking about a city that is more than 1,000 years old and is all underground. If you didn't know, you might think it's natural," Stephane De Greefe, the archaeological project's lead cartographer, told Cambodia Daily.
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