What is the best way to measure the horizontal displacement of each measuring point in the construction site with total station? Please give me some advice.

Leveling), by observing the horizontal distance between two points and zenith distance (or height angle) to determine the height difference between two points. Its observation method is simple and not limited by terrain conditions, and it is the basic method to measure the elevation of geodetic control points.

Basic principle of trigonometric leveling

, A and B are two points on the ground, and the vertical angle of point B observed from point A is α 1.2, so is the horizontal distance between two points, i 1 is the instrument height of point A, and i2 is the target height of point B, so the height difference between point A and point B is

h 1.2 = s0tga 1.2+I 1-I2

The above formula is derived on the assumption that the earth's surface is flat and the observation line of sight is straight. In geodesy, due to the long side length, the influence of earth bending difference and atmospheric vertical refraction must be considered.

In order to improve the accuracy of trigonometric leveling, the vertical angle is usually observed in the opposite direction and the height difference between two points is calculated to weaken the influence of atmospheric vertical refraction.