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Additional
Sea Level
English Wikipedia - The Free Encyclopedia
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Sea level
Sea level
is generally used to refer to
mean sea level
(MSL),
an average
level for the surface of one or more of
Earth's oceans
from which heights such as
elevations
may be measured. MSL is a type of
vertical datum
a standardised
geodetic
reference pointthat 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 in order to
calibrate
altitude
and, consequently, aircraft
flight levels
. A common and relatively straightforward mean sea-level standard is the midpoint between a
mean low and mean high tide
at a particular location.
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