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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
  • 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)
  • 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 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
  • 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 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
  • geoid - Wiktionary, the free dictionary
    geoid (plural geoids) (geography, geodesy) The shape, extending through landmasses (continents, etc ), that the surface of the oceans of the Earth would take under the influence of the Earth's gravity and rotation alone, disregarding other factors such as winds and tides; that is, a surface of constant gravitational potential at zero elevation quotations
  • Understanding Coordinate Systems: Geoid, Datum, and Projection
    The term “geoid” refers to a geophysical approximation of the Earth’s shape, representing how the surface of the Earth would look if it were a liquid, influenced only by gravity and rotation While the geoid provides a conceptual model, it is not practical for mapping and navigation
  • 13. Geoids | The Nature of Geographic Information
    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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