Abstract: Line orientation station is a method to set up the coordinate system and calculate the space coordinate and azimuth angle of the station by measuring two characteristic points separately after the station seted up by the total station. Take the first point as the origin of coordinates and the second point as the direction of X-axis or Y-axis, set up the coordinate system and calculate the space coordinate and azimuth angle of the station. The vertical distance from the space characteristic point to a lead hammer surface can be easily measured by this method. Taking Leica TS60 total station as an example, this paper introduces the operation flow and the method of line orientation station, and analyzes the precision and influencing factors of station setting. Taking the deformation measurement of two parallel rails of a single beam overhead crane in a factory building as an example, the application of this method in industrial survey is introduced.

Key words: line orientation, arbitrary station setting, resection measuring, deformation measurement, space characteristic point