NCEES Fundamentals of Surveying (FS) Practice Exam

Levelling in land surveying primarily serves to determine the height of points relative to a base level, which is crucial for establishing elevations across a site. This process involves using precise instruments to measure vertical distances, thereby allowing surveyors to assess the differences in elevation between various points. This is essential for various applications, such as designing drainage systems, constructing buildings on a slope, or creating topographic maps.

The accuracy in determining the relative heights ensures that any plans for grading, foundations, or infrastructure development can be executed effectively, taking into account the natural contours of the land. Consequently, this fundamental aspect of surveying is critical for ensuring that structures are built on stable and appropriately leveled ground.