What does mean sea level represent in geographic terms?

Mean sea level serves as a critical point of reference in geography, representing a line that is universally considered to have an elevation of zero. This standardization is essential for topographic mapping and is used by various fields, including engineering, surveying, and navigation. It facilitates consistent measurements across different regions, enabling accurate comparisons of elevation and depth.

The definition of mean sea level incorporates averaged data over a period, accounting for the variations in sea levels caused by tides, atmospheric pressure, and other natural factors. By anchoring measurements at this baseline, professionals can evaluate landforms and develop a clearer understanding of geography. The use of mean sea level as an elevation of zero is fundamental for determining the heights of mountains, the depths of oceans, and other geographical features relative to this reference point.