Define the term Geoid
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Gm
A hypothetical solid figure whose figure corresponding to mean sea level and it magnified extensions under land areas.
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=) The geoid is a model of worldwide mean sea level that is utilized to gauge exact surface elevations . The equipotential surface of the Earth's gravity field which best fits, in a least squares sense, worldwide mean sea level .
Power of gravity acts wherever opposite to the geoid, implying that plumb lines point opposite and water levels parallel to the geoid if just gravity and rotational speeding up were grinding away. The outside of the geoid is higher than the reference ellipsoid wherever there is a positive gravity inconsistency and lower than the reference ellipsoid wherever there is a negative gravity irregularity .
=) The geoid is a model of worldwide mean sea level that is utilized to gauge exact surface elevations . The equipotential surface of the Earth's gravity field which best fits, in a least squares sense, worldwide mean sea level .
Power of gravity acts wherever opposite to the geoid, implying that plumb lines point opposite and water levels parallel to the geoid if just gravity and rotational speeding up were grinding away. The outside of the geoid is higher than the reference ellipsoid wherever there is a positive gravity inconsistency and lower than the reference ellipsoid wherever there is a negative gravity irregularity .
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