The main difference between total station and optical theodolite is the dial reading and display system. The horizontal dial, vertical dial and reading device of optical theodolite use (coded dial) or two identical grating dials and reading sensors for angle measurement respectively. According to the accuracy of angle measurement, it can be divided into 0.5? , 1? ,2? ,3? ,5? ,7? Wait a few grades.
Total station, that is, total station electronic rangefinder, is a high-tech measuring instrument integrating light, machinery and electricity. It is a surveying and mapping instrument system which integrates the functions of collecting water, measuring vertical angle, distance (oblique distance and horizontal distance) and height difference.