The elevation of a place above sea level
Altitude.
Elevation. "The elevation of a geographic location is its height above a fixed reference point, often the mean sea level."
The height above or below sea level is "elevation". Altitude is used only for distance above sea level.
Elevation.
elevation
elevation
Elevation. "The elevation of a geographic location is its height above a fixed reference point, often the mean sea level."
Altitude.
Altitude
"elevation" "altitude" "contour height" "trig height" "spot height"
The height at one place is called elevation. Elevation refers to the vertical distance of a location above sea level.
On a British Ordnance Survey map 'contour lines' indicate the height above sea level and a 'trig point' indicates the top of a mountain or other high point.