What is the purpose of a peg test in surveying?

The purpose of a peg test in surveying is to check that the line of sight of a level is correct. This test is conducted to ensure that the leveling instrument is accurately aligned and functioning properly. By using pegs set at known points, surveyors can confirm that the instrument is giving reliable readings across the distances being surveyed. Ensuring the line of sight is correct is essential because any misalignment can lead to errors in the elevation measurements obtained, which can significantly affect the quality and accuracy of the survey results. The integrity of the leveling process is paramount, making this test an essential part of the surveying procedure to maintain precision.