What Is an Angle Clip?

Angle measurement is divided into horizontal angle measurement and vertical angle measurement. The horizontal angle measurement is used to determine the plane position of the ground point, and the vertical angle measurement is used to indirectly determine the elevation of the ground point and the distance between the points.

Angle measurement

Angle measurement

measurement ofangle

Determination

Observe the horizontal angle between the two directions using

The full-combination angle measurement method takes two directions at a time to form a single angle, and uses the round-back method to observe all possible single angles. The product of the number of rounds and direction at each station should be approximately equal to a constant. Since only two directions are observed at a time

Angle measurement

The single angle can overcome the difficulty that the imaging of each target cannot be clear and stable at the same time, shorten the observation time of one round, reduce the influence of external conditions, and easily obtain high-precision angle measurement results. Suitable for high-precision triangulation.

Observe the vertical angle. Use the horizontal wire of the telescope crosshair to aim at the left and right sides of the target, and read the vertical dial reading for one measurement. If there are several observation targets at the station, first observe the targets in turn on Pan Left, and then observe the opposite order on Pan Right. Before reading, the vertical level indicator bubble must be strictly centered.