1. State-Province Joint Engineering Laboratory of Spatial Information Technology for High-Speed Railway Safety, Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu, China
2. Key Laboratory of Ministry of Education on Land Resources Evaluation and Monitoring in Southwest China, Sichuan Normal University, Chengdu, China
3. Key Laboratory of Investigation, Monitoring, Protection and Utilization for Cultivated Land Resources, MNR, Sichuan Institute of Land Science and Technology (Sichuan Center of Satellite Application Technology), Chengdu, China