| ellipsoid |
In geodesy, a mathematical figure formed by revolving an ellipse about its minor axis. It is often used interchangeably with spheroid. Two quantities define an ellipsoid, the length of the semimajor axis, a, and the flattening, f = (a - b)/a, where b is the length of the semiminor axis. Prolate and triaxial ellipsoids are always described as such.
출처: www.eurofix.tudelft.nl/glossary.htm
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| ellipsoid |
the mathematical shape that best describes the shape of the earth and yet is relatively simple to deal with mathematically. Ellipsoids are defined with two numbers. First, the equatorial radius is specified (also referred to as the semimajor axis). Second, one of the following three numbers is given, the polar radius (also known as the semiminor axis), the eccentricity, or the flattening. ...
출처: cartome.org/FM3-34/Glossary.htm
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| ellipsoid |
When used to represent the earth, the three-dimensional shape obtained by rotating an ellipse about its minor axis. This is an oblate ellipsoid of revolution.
출처: www.esri.com/news/arcuser/0401/terms.html
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| ellipsoid |
A smooth mathematical surface which resembles a compressed sphere and is used to represent the earth's surface. (source -Survey Services 2003)
출처: web2.gov.mb.ca/mli/glossary/e_l.html
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| ellipsoid |
A mathematical figure generated by the revolution of an ellipse about one of its axes. The ellipsoid that approximates the geoid is an an ellipse rotated about its minor axis. An ellipsoid serves as the mathematical model from which maps and charts are produced. However, numerous ellipsoids have been developed to support local datums. The use of the WGS 84 ellipsoid provides a single standard of reference within the Department of Defense.
출처: earth-info.nga.mil/GandG/coordsys/definitions.htm
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