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  • Geoid - Wikipedia
    The geoid ( ˈdʒiː ɔɪd JEE-oyd) is the shape that the ocean surface would take under the influence of the gravity of Earth, including gravitational attraction and Earth's rotation, if other influences such as winds and tides were absent
  • Understanding Geographic Identifiers (GEOIDs) - Census. gov
    GEOIDs are numeric codes that uniquely identify all administrative legal and statistical geographic areas for which the Census Bureau tabulates data From Alaska, the largest state, to the smallest census block in New York City, every geographic area has a unique GEOID
  • What is a Geoid? Why do we use it and where does its shape come from?
    A geoid is the irregular-shaped “ball” that scientists use to more accurately calculate depths of earthquakes, or any other deep object beneath the earth’s surface Currently, we use the “WGS84” version (World Geodetic System of 1984)
  • What is the geoid? - NOAAs National Ocean Service
    This irregular shape is called "the geoid," a surface which defines zero elevation Using complex math and gravity readings on land, surveyors extend this imaginary line through the continents This model is used to measure surface elevations with a high degree of accuracy
  • Geoid | Definition Examples | Britannica
    Geoid, model of Earth’s size and shape that coincides with mean sea level over the oceans and continues in continental areas as an imaginary sea-level surface It is everywhere perpendicular to the pull of gravity and approximates the shape of a regular oblate spheroid (i e , a flattened sphere)
  • What is the geoid? - National Oceanic and Atmospheric Administration
    geoid: The equipotential surface of the Earth’s gravity field which best fits, in a least squares sense, global mean sea level Even though we adopt a definition, that does not mean we are perfect in the realization of that definition
  • What Is Geoid In Geography? Understanding the Earth’s Shape
    Geoid is an imaginary surface that is used as a reference level for measuring elevations on the Earth’s surface It is used in physical geography and geodesy to determine the height of land and sea levels
  • Geoid (geology) | EBSCO Research Starters
    The geoid is a concept in geology that represents the shape of the Earth's mean sea level across the globe, extending over oceans and under continents It is not a perfect ellipsoid; rather, it diverges from such a shape by as much as one hundred meters, reflecting variations in gravitational forces due to the Earth's internal structure
  • GEOID Definition Meaning - Merriam-Webster
    The meaning of GEOID is the surface within or around the earth that is everywhere normal to the direction of gravity and coincides with mean sea level in the oceans
  • 13. Geoids | The Nature of Geographic Information - John A. Dutton e . . .
    Geodesists define the Earth's surface as a surface that closely approximates global mean sea level, but across which gravity is everywhere equal They refer to this shape as the geoid





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