MSL

MSL, or Mean Sea Level, is a measurement of the average height of the ocean's surface relative to a fixed point on land, used as a standard reference for elevation and altitude. It represents the midpoint of the ocean's high and low tides over time, smoothing out short-term variations. MSL helps in mapping, navigation, and engineering by providing a consistent baseline for measuring the height of land features, such as mountains or buildings. Essentially, it serves as the "zero" level for height measurements worldwide, allowing for accurate comparison of elevations across different locations.