Linked from

The 35 pages that link to Geoid, each with the reason it gives.

• GeodesyRelated: It provides the gravity-based reference surface behind many practical height systems.

• LatitudeRelated: Geodetic latitude is defined relative to a reference ellipsoid approximating Earth, while the geoid describes its gravity-shaped surface.

• IsostasyRelated: Geoid shape records gravitational effects of crustal and mantle mass variations.

• Gravitational potentialRelated: The geopotential helps define this reference surface used in geodesy.

• Geographic coordinate systemRelated: It provides a gravity-based model of Earth’s shape relevant to defining latitude and height.

• Glacial isostatic adjustmentRelated: Redistributed ice and mantle mass alter gravity, changing the geoid as well as land elevation.

• ElevationRelated: It provides a gravity-based reference surface for heights.

• Gravitational fieldRelated: The field and its potential define the shape used as a geodetic height reference.

• Geodetic datumRelated: It provides a gravity-based height reference distinct from the datum’s ellipsoid.

• Satellite altimetryRelated: It provides a gravity-based reference for interpreting measured surface heights.

• Eustatic sea-level changeRelated: Gravity variations shape the reference surface used to interpret ocean-height changes.

• Mean sea levelRelated: The geoid helps distinguish sea-surface height from the gravity-based reference used for elevations.

• Gravitational time dilationRelated: Clocks at the same geopotential rate define a practical reference surface for precise timekeeping.

• Vertical datumRelated: Many vertical datums use a geoid-like surface to define zero elevation.

• Gravity anomalyRelated: Reference gravity and anomaly calculations depend on the adopted Earth model and reference surface.

• Sea levelRelated: Geodesy uses the geoid to extend a sea-level-like reference across land.

• Oblate spheroidCompared with: It follows Earth’s gravity field rather than a simple spheroidal geometry.

• Relative sea levelRelated: Gravity-field changes alter the sea surface’s regional shape and its relation to land.

• Satellite geodesyRelated: Gravity measurements from satellites help determine the geoid and relate heights to sea level.

• World Geodetic System 1984Compared with: It differs from the WGS 84 ellipsoid, which is a smooth mathematical surface.

• Earth's gravity fieldRelated: Its shape summarizes the field's large-scale variations in gravitational potential.

• Mantle viscosityRelated: Long-term mantle flow redistributes mass and creates gravity anomalies used to infer viscosity.

• Planetary radiusRelated: For Earth, this irregular reference surface differs from a simple ellipsoid.

• Orthometric heightRelated: Orthometric height ends at this gravity-defined reference surface.

• Figure of the EarthBroader topic: It represents gravity-driven departures from a smooth reference ellipsoid.

• Earth ellipsoidCompared with: Unlike the geometric ellipsoid, the geoid follows variations in Earth’s gravity field.

• Spherical EarthBroader topic: It differs from a smooth sphere by accounting for uneven gravity and mass distribution.

• Equatorial bulgeRelated: The geoid accounts for Earth's uneven gravity, including effects associated with its shape.

• Plumb bobRelated: The local vertical indicated by a plumb line is normal to the geoid.

• Circle of latitudeRelated: Real-world latitude circles are mapped on an irregular Earth reference surface.

• GeodynamicsBroader topic: Its deviations from a reference ellipsoid reveal uneven mass distribution inside Earth.

• Gladys WestBroader topic: West modeled this irregular reference surface to improve estimates of Earth’s shape.

• Height above mean sea levelRelated: It provides a gravity-based approximation to mean sea level on land.

• Ocean surface topographyRelated: It provides the gravity-based reference surface against which ocean height is interpreted.

• Physical geodesyBroader topic: It is the physical reference surface whose shape physical geodesy seeks to determine.