Sea level

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-	*[[geoid]]	+	[[Sea level]], aka [[mean sea level]], is the average height of the sea.  This concept is extended throughout the globe by an [[equipotential]] [[closed surface]] called the [[geoid]].  The geoid is irregular in shape.  It is not a [[sphere]], and in fact it is not even a [[spheroid]].

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Revision as of 11:42, 23 October 2006

Sea level, aka mean sea level, is the average height of the sea. This concept is extended throughout the globe by an equipotential closed surface called the geoid. The geoid is irregular in shape. It is not a sphere, and in fact it is not even a spheroid.