安裝中文字典英文字典辭典工具!
安裝中文字典英文字典辭典工具!
|
- 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?
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
- 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? - 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 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
- 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)
- The geoid, ellipsoid, spheroid, and datum, and how they are . . . - Esri
The geoid is defined as the surface of the earth's gravity field, which is approximately the same as mean sea level It is perpendicular to the direction of gravity pull
- 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
|
|
|