2006-07-29 06:42:44 · 5 answers · asked by ? 2 in Science & Mathematics ➔ Earth Sciences & Geology
Sea level as mapped is "mean high water," which is the average of all high tides at a given place.
For geodetic purposes, a slightly different standard is used: the earth is assumed to be an oblate spheroid of a given radius and a given flatness. The commonly used WGS-84 spheroid has a radius of 6378.137 km and a flatness of 1 part in 298.257223563 . From these data, the theoretical sea level at any point can be computed.
2006-07-29 07:02:38 · answer #1 · answered by Keith P 7 · 1⤊ 0⤋
Sea level refers to water that's completely undisturbed -- no winds, no waves, nothing to disturb it. When you hear a reference to a place being X feet above or X feet below sea level, that's in reference to an ideal condition.
2006-07-29 13:47:14 · answer #2 · answered by ensign183 5 · 0⤊ 0⤋
The point at whuch the land meets the sea.
2006-07-29 13:48:50 · answer #3 · answered by ag_iitkgp 7 · 0⤊ 0⤋
This is a very interesting ?, and it has numerous interesting answers. See one of them at
http://en.wikipedia.org/wiki/Sea_level
or google 'sea level definition' to see the other 22.5 mega-answers
2006-07-29 14:04:49 · answer #4 · answered by Steve 7 · 0⤊ 0⤋
Who wants to know?
2006-07-29 13:47:14 · answer #5 · answered by Anonymous · 0⤊ 0⤋