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- Geoid abstract "The geoid is the shape that the surface of the oceans would take under the influence of Earth's gravitation and rotation alone, in the absence of other influences such as winds and tides. All points on that surface have the same scalar potential—there is no difference in potential energy between any two.Specifically, the geoid is the equipotential surface that would coincide with the mean ocean surface of the Earth if the oceans and atmosphere were in equilibrium, at rest relative to the rotating Earth, and extended through the continents (such as with very narrow canals). According to Gauss, who first described it, it is the "mathematical figure of the Earth", a smooth but highly irregular surface that corresponds not to the actual surface of the Earth's crust, but to a surface which can only be known through extensive gravitational measurements and calculations. Despite being an important concept for almost two hundred years in the history of geodesy and geophysics, it has only been defined to high precision in recent decades, for instance by works of Petr Vaníček, and others. It is often described as the true physical figure of the Earth, in contrast to the idealized geometrical figure of a reference ellipsoid.The surface of the geoid is higher than the reference ellipsoid wherever there is a positive gravity anomaly (mass excess) and lower than the reference ellipsoid wherever there is a negative gravity anomaly (mass deficit). The differences in gravity, and hence the scalar potential field, arise from the uneven distribution of mass in the Earth.".
- Geoid thumbnail Geoid_height_red_blue_averagebw.png?width=300.
- Geoid wikiPageExternalLink egm96.html.
- Geoid wikiPageExternalLink index.html.
- Geoid wikiPageExternalLink index.html.
- Geoid wikiPageExternalLink geographiclib.sourceforge.net.
- Geoid wikiPageExternalLink GeoidEval.
- Geoid wikiPageExternalLink gravity_definition.html.
- Geoid wikiPageExternalLink Li_Goetze_Geophysics_2001.pdf.
- Geoid wikiPageExternalLink www.iges.polimi.it.
- Geoid wikiPageExternalLink geollab.htm.
- Geoid wikiPageExternalLink geoid.htm.
- Geoid wikiPageExternalLink GEOID.
- Geoid wikiPageExternalLink home.htm.
- Geoid wikiPageExternalLink home.
- Geoid wikiPageID "176244".
- Geoid wikiPageRevisionID "601789941".
- Geoid hasPhotoCollection Geoid.
- Geoid subject Category:Geodesy.
- Geoid subject Category:Gravimetry.
- Geoid comment "The geoid is the shape that the surface of the oceans would take under the influence of Earth's gravitation and rotation alone, in the absence of other influences such as winds and tides.".
- Geoid label "Geoid".
- Geoid label "Geoid".
- Geoid label "Geoida".
- Geoid label "Geoide".
- Geoid label "Geoide".
- Geoid label "Geoide".
- Geoid label "Geoïde".
- Geoid label "Géoïde".
- Geoid label "Геоид".
- Geoid label "مجسم أرضي".
- Geoid label "ジオイド".
- Geoid label "大地水准面".
- Geoid sameAs Geoid.
- Geoid sameAs Geoid.
- Geoid sameAs Γεωειδές.
- Geoid sameAs Geoide.
- Geoid sameAs Géoïde.
- Geoid sameAs Geoide.
- Geoid sameAs ジオイド.
- Geoid sameAs 지오이드.
- Geoid sameAs Geoïde.
- Geoid sameAs Geoida.
- Geoid sameAs Geoide.
- Geoid sameAs m.017x7s.
- Geoid sameAs Q185969.
- Geoid sameAs Q185969.
- Geoid wasDerivedFrom Geoid?oldid=601789941.
- Geoid depiction Geoid_height_red_blue_averagebw.png.
- Geoid isPrimaryTopicOf Geoid.
