Pole signal

A pole signal is a modern way of marking fixed points in geodesy ; it can also be used as a long-term goal and replaces the wooden pyramids that were often used in the past.

The rod consists of a five to eight centimeter thick, mostly three meter high metal tube, on the upper part of which a three-dimensional target mark is attached. In the simplest version, it consists of two black or yellow metal plates crossed at right angles, which create a symmetrical image from all sides for precise aiming . The high-contrast version in black or bright yellow (occasionally orange-red) is beneficial in that such color tones rarely occur in nature.

A simple concrete foundation is sufficient for the pole , provided it reaches below the maximum frost limit of the area, or a drill hole directly in the natural rock .

Also state borders are increasingly in a similar manner by rods stabilized .