Question

WHAT IS HIGHT ABOVE THE SEA EXPLAIN IN 3 LINES ((((PLEASE DON'T COPY IT FROM GOOGLE))))​

Answer 1

Answer:

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Height above mean sea level (AMSL) is the elevation (on the ground) or altitude (in the air) of an object, relative to the average sea level datum. An alternative is to base height measurements on an ellipsoid of the entire Earth, which is what systems such as GPS do

Answer 2

Answer:

Mean sea level (MSL) (often shortened to sea level) is an average level of the surface of one or more of Earth's bodies of water from which heights such as elevation may be measured. The global MSL is a type of vertical datum – a standardised geodetic datum – that is used, for example, as a chart datum in cartography and marine navigation, or, in aviation, as the standard sea level at which atmospheric pressure is measured to calibrate altitude and, consequently, aircraft flight levels. A common and relatively straightforward mean sea-level standard is instead the midpoint between a mean low and mean high tide at a particular location