Sea level rises and falls, so a datum line was put by the British Ordnance Survey on a harbour wall at Newlyn, Cornwall. It is from this datum line that mean sea level is measured.
Elevation, altitude, height above sea level.
i think it would be a no because sea level is the lowest level object
Elevation or altitude measures the distance of something above sea level. It is a vertical measurement typically used in geography, aviation, and hiking to describe the height of a point or object in relation to sea level.
Altitude describes an object's position relative to sea level. An object in a position higher than sea level would have a positive altitude, sea level would have an altitude of zero, and any object below sea level would have a negative altitude.
110 metres above sea level
at sea level
The word to describe the height above sea level of a geographic point is "elevation."
It is 544 feet above sea level.
It is 781 feet above sea level.
Part of it is at sea level. The highest point is 18.04 ft above sea level.
Elevation above sea level refers to the height of a location or object above the average level of the sea's surface. It is typically measured in feet or meters and is used to describe the vertical distance between a point on Earth's surface and sea level. Areas at higher elevations generally have cooler temperatures and different climate conditions compared to low-lying areas.
500 ft above sea level