1. College of Geoscience and Surveying Engineering, China University of Mining and Technology, Beijing (CUMTB), Beijing, China
2. Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing, China
3. College of Surveying and Geo-informatics, North China University of Water Resources and Electric Power, Zhengzhou, China
4. College of Resource Science and Technology, Beijing Normal University (BNU), Beijing, China
5. Institutes of Science and Development, Chinese Academy of Sciences, Beijing, China