1. Lanzhou Jiaotong University, Lanzhou Research Institute of Surveying and Mapping, National-Local Joint Engineering, Research Center of Technologies and Applications for National Geographic State,Faculty of Geomatics, Gansu Provincial Engineering Laboratory for National Geographic State Monitoring,Lanzhou,China
2. Lanzhou Jiaotong University, National-Local Joint Engineering Research Center of Technologies and Applications for National Geographic State,Faculty of Geomatics, Gansu Provincial Engineering Laboratory for National Geographic State Monitoring,Lanzhou,China
3. Institute of Geographical Spatial, Information, Information Engineering University,Zhengzhou,China
4. Lanzhou Research Institute of Surveying and Mapping,Lanzhou,China