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

Hongtao Zhu, Weijun Wu, Zhiyong Wang
2009 Modern Applied Science  
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.
doi:10.5539/mas.v3n3p128 fatcat:poj55wnf6bcypacgx3lfdhrwq4