1. Faculty of Geomatics, Lanzhou Jiaotong University, Lanzhou, People’s Republic of China
2. Lanzhou Ji Er Ai Si Spatial Information Technology Company Limited, Lanzhou, People’s Republic of China
3. National-Local Joint Engineering Research Center of Technologies and Applications for National Geographic State Monitoring, Lanzhou, People’s Republic of China
4. Gansu Provincial Engineering Laboratory for National Geographic State Monitoring, Lanzhou, People’s Republic of China
5. People’s Republic of China Navigation Publication Press, Tianjin, People’s Republic of China