1. School of Geography and Ocean Science, the Jiangsu Provincial Key Laboratory of Geographic Information Science and Technology, the Key Laboratory for Land Satellite Remote Sensing Applications of Ministry of Natural Resources, and the Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing University, Nanjing, China
2. State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu, China
3. College of Surveying and Geoinformatics, Tongji University, Shanghai, China
4. Nanjing Research Institute of Surveying, Mapping and Geotechnical Investigation Company Ltd., Nanjing, China