When a staff is sighted through the telescope, a certain length of staff is intercepted by the stadia lines. The staff intercept varies with the distance at which the staff is held.

Question

Quizplus · Accepted Answer

The staff intercept, or the distance between the stadia lines as seen through the telescope, varies directly with the distance from the instrument to the staff. This principle is used in stadia tacheometry for distance measurement.

When a Staff Is Sighted Through the Telescope, a Certain