Study on the Free-positioning of ETS in the PDL Track Surveying System

  •  Hongtao Zhu    
  •  Weijun Wu    
  •  Zhiyong Wang    


The station positioning by the electric total station (ETS) is the first step which must be done for the passenger dedicated line track survey and one of the important factors which influence the final surveying precision. To enhance the surveying efficiency and surveying precision, we study the principles and methods of free positioning by ETS.

This work is licensed under a Creative Commons Attribution 4.0 License.