Orthometric height

Orthometric height is the height of a point on the Earth's surface above the geoid, which is an equipotential surface that represents mean sea level. In simpler terms, it is the vertical distance from a point on the Earth's surface to the geoid. Orthometric heights are important in various fields such as geodesy, surveying, and engineering, as they provide a more accurate representation of height that takes into account the gravitational variations across the Earth's surface.