After analyzing the source and effect of measuring error
all the system errors of a photoelectric theodolite were obtained with means of shooting star
based on which
programs to fulfill the real-time error-correction for the photoelectrical theodolite's measuring result were given. The measuring data from a certain kind of photoelectrical theodolite were corrected using the proposed method. Through comparing the measuring precision before and after error-correction
the results indicate that this correction method can improve photoelectrical theodolite's measuring precision from about 15″ to less than 5″;that is to say the correction effect is obvious enough to prove that the method has achieved the expectant purpose.