1. Jiangsu Provincial Key Laboratory of Geographic Information Science and Technology, International Institute for Earth System Science; Nanjing University; Nanjing China
2. Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application; Nanjing China
3. State Key Laboratory of Resources and Environmental Information System, Institute of Geographical Sciences and Natural Resources Research; Chinese Academy of Sciences; Beijing China
4. Department of Land Surveying and Geo-Informatics; Hong Kong Polytechnic University; Kowloon Hong Kong
5. School of Resources and Environment and Information Geoscience Research Center; University of Electronic Science and Technology of China; Chengdu China