Reference Ellipsoid (Oblate Spheroid)
Technical Details & Mathematical Formulation
The Earth polar radius ($b \approx 6356.75\text{ km}$) is 21.38 km shorter than its equatorial radius ($a \approx 6378.14\text{ km}$) due to centrifugal forces generated by Earth daily rotation.
f = \frac{a - b}{a},\quad e^2 = \frac{a^2 - b^2}{a^2} = 2f - f^2Test real-world coordinates and calculate live results in browser.
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People Also Ask About Reference Ellipsoid (Oblate Spheroid)
Answers to key questions, technical definitions, and practical geodetic applications.
QWhat does the term "Reference Ellipsoid (Oblate Spheroid)" mean?
A reference ellipsoid is a mathematically defined oblate surface formed by rotating an ellipse around its minor (polar) axis, approximating the geometric shape of the Earth.
QWhat is the mathematical or technical basis of Reference Ellipsoid (Oblate Spheroid)?
The Earth polar radius ($b \approx 6356.75\text{ km}$) is 21.38 km shorter than its equatorial radius ($a \approx 6378.14\text{ km}$) due to centrifugal forces generated by Earth daily rotation.
QHow do professionals use Reference Ellipsoid (Oblate Spheroid) in GIS and surveying?
Cartographers, geospatial software engineers, and navigators utilize Reference Ellipsoid (Oblate Spheroid) to guarantee mathematical precision and consistent spatial reference frames across global datasets.
QWhich category of geodesy does Reference Ellipsoid (Oblate Spheroid) belong to?
This concept is cataloged under the "Geodesy & Datums" domain in the GeoMap Suite cartographic knowledge index.
QCan I test or calculate Reference Ellipsoid (Oblate Spheroid) on GeoMap Suite?
Yes. You can test live coordinates and see practical examples using our companion Coordinate Distance Calculator tool.
QWhat are key concepts related to Reference Ellipsoid (Oblate Spheroid)?
Directly related terms include WGS84 Datum, Geoid.