1. School of Land Science and Technology, China University of Geosciences, Beijing, People’s Republic of China
2. Division of Remote Sensing for Environment, China Aero Geophysical Survey and Remote Sensing Center for Land and Resources, Beijing, People’s Republic of China
3. Key Laboratory of Digital Earth Science, Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing, People’s Republic of China
4. School of Sciences and Technology, University of Trás-os-Montes e Alto Douro, Vila Real, Portugal
5. Centre for Robotics in Industry and Intelligent Systems, INESC TEC, Porto, Portugal
6. Polish Geological Institute—National Research Institute, Cracow, Poland