1. Key Laboratory of Environmental Change and Resource Use in Beibu Gulf, Ministry of Education, School of Geography and Planning, Nanning Normal University, Nanning, People’s Republic of China
2. State Key Laboratory of Remote Sensing Science, Faculty of Geographical Sciences, Beijing Normal University, Beijing, People’s Republic of China
3. College of Geographic and Environmental Sciences, Tianjin Normal University, Tianjin, People’s Republic of China
4. School of Geography and Remote Sensing, Guangzhou University, Guangzhou, People’s Republic of China