1. Institute of Geography, Fujian Normal University, Fuzhou, China
2. Key Laboratory for Humid Subtropical Eco-Geographical Processes of the Ministry of Education, Fujian Normal University, Fuzhou, China
3. Department of Geography and Planning, University of Toronto, Toronto, Canada
4. Research Center of Digital Mountain and Remote Sensing Application, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu, China