Total station, that is Electronic Total Station, is a high-tech measuring instrument that integrates light, machinery and electricity. It is a surveying and mapping instrument system that integrates the functions of measuring water collection angle, vertical angle, distance (oblique distance, horizontal distance) and height difference.

Real-time kinematic is a measurement method that can get centimeter-level positioning accuracy in real time in the field, and its appearance has greatly improved the field operation efficiency.

Level was invented in 17th-18th century after the telescope and water level were invented. At the beginning of the 20th century, a micro-tilt level was produced on the basis of making an internal focusing telescope and a leveling instrument.

Range finder is a tool for measuring length or distance, and it can be combined with angle measuring equipment or modules to measure angle, area and other parameters.

Vertical leveling instrument is widely used in the construction and installation of high-rise buildings, towers, chimneys, elevators and large-scale institutional equipment.

Theodolite is a kind of measuring instrument designed according to the angle measuring principle to measure horizontal angle and vertical angle, which can be divided into optical theodolite and electronic theodolite. [1] Electronic theodolite is the most commonly used one.