In April 2012, Helistar Cambodia flew the largest ever archaeological LiDAR survey mission over the temple ruins of Angkor Wat, Koh Ker, Boeng Mealea and Kulen mountain. This precise survey was conducted at 800 metros and at a speed of 85 knots. The date that was obtained was far beyond what the organizing archaeologists could have imaged.

Also, we found this article which was written on the following links:

http://www.profsurv.com/magazine/article.aspx?i=71167
http://www.postkhmer.com/index.php/national/1-national-news/99389-2013-06-17-03-29-32
http://www.huffingtonpost.com/2013/06/15/mahendraparvata-lost-city-cambodia_n_3445545.html#slide=2430652
http://www.channelnewsasia.com/news/lifestyle/lost-medieval-city-found/711056.html
http://www.dailymail.co.uk/news/article-2342339/Lost-medieval-city-Cambodia-using-revolutionary-scanning-technology-Indiana-Jones-style-expedition.html
http://www.straitstimes.com/breaking-news/se-asia/story/lost-medieval-city-found-cambodia-report-20130615
http://zeenews.india.com/news/world/lost-medieval-city-discovered-in-cambodia_855224.html
http://www.smh.com.au/world/revealed-a-lost-city-and-a-holy-temple-20130614-2o9ds.html
http://indiatoday.intoday.in/story/a-lost-medieval-city-older-than-angkor-wat-unearthed-in-cambodia/1/280355.html
http://www.chinapost.com.tw/life/discover/2013/06/16/381303/Lost-medieval.htm
http://www.nytimes.com/2013/07/02/science/angkors-urban-environs-mapped-from-above.html?_r=1&
http://jyllands-posten.dk/kultur/historie/ECE5637143/1200-ar-gammel-by-gemt-under-junglen/
http://edition.cnn.com/2013/07/01/travel/cambodia-temple-discovery