Abstract:There are often many trees or building facilities near the embankments of rivers, lakes, rivers and seas. When GPS is used to monitor the horizontal displacement of the embankments, the signal is easy to be blocked by the water surface and the surrounding trees or building facilities. When setting stations with the reference network in the far area outside the embankments as the orientation, the total station coordinate method, intersection method, polar coordinate method and collimation line method are also blocked. This problem can be solved by setting the temporary working base point and using the method of automatic total station to measure the traverse with multiple back angles.