What is the use of control points in measurement?

The function of survey control point is to indicate the coordinates and height of the point, and carve and number it according to the needs of users. It is an excellent product to comprehensively enhance the image of surveying and mapping units.

Control points are divided into plane control points and elevation control points, and plane control points are divided into triangle points, traverse points, GPS points and other types.

Extended data:

Elevation control points are usually established by leveling, which are called leveling points. The selection of leveling points shall meet the following requirements.

(1) The leveling point shall be selected in a stable place, which can be preserved for a long time and is convenient for measurement.

(2) The leveling route shall be laid along roads with small slopes as far as possible, and obstacles such as swamps shall be avoided as far as possible.

(3) When selecting leveling points, further encryption of elevation control network should be considered.

(4) It should be considered to facilitate the joint measurement of national leveling points.

References:

Baidu encyclopedia-measurement control point