Electromagnetic height measurement in the center line level surveying of road

According to analyzing of the theory and testing of the experimental data, during the center line level surveying of road, accuracy of one way height surveying with total station instrument can meet the corresponding standard requirement. So at the same time of putting the middle stakes of the road with total station instrument, we can immediately survey height of corresponding spot. The method is fully to bring into play the function of total station instrument and improve the efficiency.