For more than a century , a sprawling city of the Khmer Empire sleep together as Mahendraparvata , dating from the 8th to 9th hundred CE , has both intrigued and mystified archaeologist . Now , novel technologies are allow researchers to map the realm in corking detail for the first time , not only confirming its location but adding to the enigma that progress to up this ancient urban metropolis .
The Khmer Empire reigned what is now Cambodia between the ninth and 15th centuries and is best known forAngkor Wat , a Brobdingnagian temple complex . Mahendraparvata predates Angkor and could be the first big - scale urban center be after and build according to a power system system .
Until now , archeologic evidence was limited to small and isolated shrines scatter throughout the countryside of Phnom Kulen plateau . anatomical structure make by the Khmer Empire were mainly made of wood and other perishable materials that have since disappeared . But archaeologists can retrace morphologic contours of the terrain , which leave a “ durable legacy ” on the surface of the Earth .

But slow vegetation and undischarged land mines from civil agitation during the nineties make ground surveys unmanageable . Using airborne optical maser scanning ( LiDAR ) , arevolutionary technologythat can see through vegetation and provide high - resolve model of the forest floor , archaeologists for the first time have extensively mapped Mahendraparvata . LiDAR technology has been antecedently used to discoverthousands of ancient Mayan structuresand amega - cityin Guatemala . When combine with the ground - based survey , the finding let archaeologists to determine the boundaries of the ancient urban center of Mahendraparvata dating back more than 1,200 years .
Between 2012 and 2017 , archaeologists visited 598 fresh document features . When combined with LiDAR technology , the work resulted in the uncovering of thousands of archeologic features , stretch across an area of 50 substantial kilometre ( 20 square mi ) around a centrally project urban orbit . A “ model of linear bloc , oriented roughly to fundamental focussing ” was found that connected dams , temples , neck of the woods , and the royal palace , publish investigator in the October issue ofAntiquity . Their employment may have even discovered city blocks that align in a power grid - comparable form similar to modern city suggesting it was build with a city plan in mind .
Unfinished humankind - made lakes were also find , indicate that the urine management system may not have been able-bodied to support Elmer Rice agriculture . carbon 14 go out of mysterious pitcher’s mound scattered throughout the area suggests they date back to around a millenary ago . It is unreadable what they were used for though the investigator have ruled out funerary practices or habitation .
“ The piece of work described here effectively draws to a stuffy 150 years of archaeological single-valued function work in the Greater Angkor region and sets the leg for more advanced spatio - worldly modeling of urban form , ” drop a line the authors , bestow that this work is “ crucial for read the historic flight of Angkor and the Khmer Empire . ”