We call this "elevation".
Height of vellore above sea level is 216m (709 Feets)
80' to 100' above sea level
Aprox. 27 feet above sea level
It is 561 feet above sea level.
7,500 ft above sea level
It is 930 meters above sea level.
== == Science Major: Altitude is height above mean sea level (MSL) or true altitude, which means in reference to what sea level is on the ground, or height above ground level (AGL), which is also called absolute altitude, which means height above the ground with no reference to the ground's height above sea level. In example, if the sea level in a certain place is 100 feet and you are 250 feet above the ground, your altitude above sea level would be 350 feet, and your altitude above ground level would be 250 feet.
cochin is below sea level
Sea level is a standard 'height' from which you can measure the relative height of objects (ie. cities) as such, high above sea level would refer to something 1,000+ metres above sea level... or whatever definition you think appropriate.
Mexico City is 2200 meters above sea level.
It has an average height of 853 feet above sea level.