It is called the ELEVATION
Dry land is usually above sea level.
i
elevation
i
i
It could be called the elevation or altitude of the particular land-form.
We call this "elevation".
Zero level
the height of land above or below the level of the ocean or sea level
ELEVATION :)
Sea level gives a reference point. Sea level is 0 so from there we can determine the height of land and whether that land is prone to flooding.
The height or the altitude of the land is its distance above sea level. This is referred to as the elevation of the land.