What defines a deflection angle in surveying?

A deflection angle in surveying is specifically defined as the angle between a line and the prolongation of the preceding line. This measurement is crucial in surveying as it helps in determining the change in direction between two lines at a point of intersection. It reflects how much the direction of the survey line deviates from the previous line, which can be vital for accurate mapping and layout purposes.

The definition focuses on the geometrical relationship of the lines being surveyed, providing insight into the orientation changes that occur, which are essential for creating accurate representations of the land. This angle is often used in geometric designs and calculations for road construction, boundaries, and other land-related projects.

Understanding the deflection angle is also important in civil engineering and construction, as it helps in determining the correct angles required for structures or pathways that need to align with existing features.