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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
  • What is a Geoid? Why do we use it and where does its shape come from?
    The geoid is an imaginary sea level surface that undulates (has a wavy surface) over all of the earth; it isn’t just for the oceanic areas, it also extends through the land masses
  • 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
  • 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? | NGS Facts | NGS INFO - About Us | National . . .
    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
  • What Is the Geoid? Earth’s True Shape and Sea Level
    The geoid is a model of Earth’s shape based purely on gravity It represents the surface where gravity’s pull is equal everywhere, corresponding roughly to where global mean sea level would sit if oceans covered the entire planet with no tides, currents, or weather
  • How gravity shapes Earth - Visuals by earth online
    The geoid is the surface of an ideal global ocean in the absence of tides and currents, shaped only by gravity The colours in the image represent deviations in height from an ideal geoid
  • 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
  • What do the terms geoid, ellipsoid, spheroid and datum mean, and how . . .
    The geoid is defined as the surface of the earth's gravity field, which approximates mean sea level It is perpendicular to the direction of the force of gravity Since the mass of the Earth is not uniform at all points, the magnitude of gravity varies, and the shape of the geoid is irregular
  • Geoids, Ellipsoids, and Undulation Height: Understanding the Basics . . .
    A geoid is a surface of equal gravitational potential, which closely approximates the shape of the Earth’s sea level The geoid is an imaginary surface that is used as a reference for measuring the Earth’s gravity field





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