1. School of Information Science and Technology, Yunnan Normal University, Kunming, China
2. Faculty of Geography, Yunnan Normal University, Kunming, China
3. Yunnan Provincial Department of Education, Key Laboratory of Resources and Environmental Remote Sensing for Universities in Yunnan, Kunming, China
4. Center for Geospatial Information Engineering and Technology of Yunnan Province, Kunming, China
5. Yunnan Provincial Bureau of Geology and Mineral Resources, Yunnan Institute of Geological Sciences, Kunming, China