1. School of Geodesy and Geomatics, Wuhan University, Wuhan, China
2. Hubei Luojia Laboratory, Wuhan, China
3. China Merchants Chongqing Communications Research and Design Institute, Company Ltd., Chongqing, China
4. Chongqing Jiaotong University, Chongqing, China
5. Electrical Science Institute of Guizhou Power Grid, Company Ltd., CSG, Guiyang, China
6. Natural Resources Archives of Hebei Province, Shijiazuang, China