1. Key Laboratory of Digital Earth Science, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing, China
2. Institute of Forest Resource Information Techniques, Chinese Academy of Forestry, Beijing, China
3. Global Environmental Modelling and Earth Observation (GEMEO), Department of Geography, Swansea University, Swansea, U.K.
4. School of Marine Technology and Geomatics, Jiangsu Ocean University, Lianyungang, China