Why are benchmarks important in geodesy?

Benchmarks are essential in geodesy because they serve as fixed reference points for elevation and vertical control. This means they provide a stable and known point in the Earth’s surface that can be used as a baseline for other measurements. In surveying and mapping, accurate knowledge of elevation is crucial, especially when dealing with projects like road construction, floodplain mapping, or any work that involves topographical considerations.

By having established benchmarks, geodetic engineers can ensure that their measurements are consistent and reliable over time, facilitating the accurate determination of landforms, surface alterations, and infrastructure planning. These reference points also help in achieving uniformity in data collection across different areas, which is vital for various applications in engineering, land development, and environmental studies.