The illustrated equipment is called a ranging pole.
A ranging pole is a long, straight stick or rod used to measure distances or to determine the position of something. It can be used in surveying, construction, or any other field where precise measurements are needed. The pole is held vertically and its shadow is used to determine the angle of the sun or other reference points, allowing the user to make accurate measurements. The ranging pole is a simple and effective tool that has been used for centuries to help people measure and map the world around them.
The illustrated equipment is called?