The height of a place from the sea level is called​

Mean level

The elevation is the height of point that is found above the sea levels and these levels is called as the average or the mean level and has an average height above the surface and can be seen the rise and the fall of the tides in an open coastal area over a period of 19 years

Altitude, like elevation, is the distance above sea level. ... This is called indicated altitude, and is measured by an instrument called an altimeter. As altitude rises, air pressure drops.

Explanation:

what's the