What is the primary use of the deflection angle in surveying?

The primary use of the deflection angle in surveying is to determine alignment between points. This angle is measured between a survey line and a reference direction, such as the original line of the survey or a north-south line. By calculating the deflection angle, surveyors can understand how much a line deviates from a straight path and make the necessary adjustments in their measurements or map layouts.

This alignment is crucial in various surveying applications, such as establishing routes for roads, pipelines, and other linear structures, where precise angles dictate the correct positions of these features. Understanding deflection angles allows surveyors to create accurate and functional designs that adhere to spatial planning needs across the landscape.