1. Faculty of Geography, Yunnan Normal University, Kunming 650500, China
2. College of Geography and Environment, Shandong Normal University, Jinan 250358, China
3. Southwest United Graduate School, Kunming 650092, China
4. Key Laboratory of Resources and Environmental Remote Sensing for Universities in Yunnan, Kunming 650500, China
5. Center for Geospatial Information Engineering and Technology of Yunnan Province, Kunming 650500, China