1 Department of Cartography, GIS and Remote Sensing, Institute of Geography, Georg-August University of Goettingen, Goettingen 37077, Germany(1); Key Laboratory of Coastal and Wetland Ecosystems (Ministry of Education), College of the Environment and Ecology, Xiamen University, Xiamen 361102, China(2). Electronic address: ly463526@gmail.com.
2 Department of Cartography, GIS and Remote Sensing, Institute of Geography, Georg-August University of Goettingen, Goettingen 37077, Germany(1).
3 Balsillie School of International Affairs, Faculty of Environment, University of Waterloo, 67 Erb Street West, Waterloo, ON N2L 6C2, Canada.
4 Key Laboratory of Coastal and Wetland Ecosystems (Ministry of Education), College of the Environment and Ecology, Xiamen University, Xiamen 361102, China(2). Electronic address: yangf@xmu.edu.cn.