What is a Total Station and How It Evolved From the Theodolite

Every survey instrument used today traces back to a simple problem: measuring angles and distances accurately in the field. The theodolite solved the angle half of that problem more than a century ago. The Total Station, the instrument seen on nearly every construction site today, solved the distance half by combining both functions into one device.

What a Theodolite Actually Measured

A theodolite is an optical instrument that measures horizontal and vertical angles with high precision. Surveyors used it alongside a separate measuring chain or tape to determine distances, then applied trigonometry manually to calculate coordinates. This was accurate but slow, and heavily dependent on the surveyor's calculation skill.

A modern Total Station on site. The same core principle as a theodolite, angle measurement, now combined with instant distance calculation.

Why Total Stations Remain Essential Today

Both instruments still have their place on our project sites. Learn more about how we combine DGPS and Total Station survey methods for the best of speed and precision.