1. Key Laboratory of Digital Earth Science, Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, No. 9 Dengzhuang South Road, Haidian District, Beijing 100094, China.
2. International Centre on Space Technologies for Natural and Cultural Heritage under the Auspices of UNESCO, No. 9 Dengzhuang South Road, Haidian District, Beijing 100094, China.
3. Institute of Space and Earth Information Science, The Chinese University of Hong Kong, ShaTin, New Territories, Hong Kong, China.
4. Authority for the Protection and Management of Angkor and the Region of Siem Reap, Bangkoung Village, Ampil District, Siem Reap Town, Siem Reap Province, Cambodia.