Geoid - Wikipedia The geoid ( ˈ dʒ iː ɔɪ d 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? 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)
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? - NOAAs National Ocean Service The geoid is a model of global mean sea level that is used to measure precise surface elevations A depiction of the United States geoid Areas in yellow and orange have a slightly stronger gravity field as a result of the Rocky Mountains
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 defined as an equipotential surface of the Earth’s gravity field that coincides with the mean sea level It is an imaginary surface that closely approximates the shape of the Earth, taking into account the irregularities in the distribution of mass within the Earth
Geoid - Simple English Wikipedia, the free encyclopedia 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 It was defined by Gauss, in 1828 [1] It is often described as the true physical shape of the Earth [2]
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 (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