prime meridian wikipedia - EAS
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A prime meridian is the meridian (a line of longitude) in a geographic coordinate system at which longitude is defined to be 0°. Together, a prime meridian and its anti-meridian (the 180th meridian in a 360°-system) form a great circle. This great circle divides a spheroid into two hemispheres. If
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See moreThe notion of longitude for Greeks was developed by the Greek Eratosthenes (c. 276 – 195 BCE) in Alexandria, and Hipparchus (c. 190 – 120 BCE) in Rhodes, and applied to a large number of cities by the
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See moreAs on the Earth, prime meridians must be arbitrarily defined. Often a landmark such as a crater is used; other times a prime meridian is defined by reference to another celestial object, or
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See more• Burgess, Ebenezer (1860), "Translation of the Surya-Siddhanta", Journal of the American Oriental Society (e-book), vol. 6 (published 2013), p. 185
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See moreSince 1984, the international standard for the Earth's prime meridian is the IERS Reference Merdian. Between 1884 and 1984, the meridian of Greenwich was the world standard. These
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See more• 1st meridian east – Meridian 1° east of Greenwich
• 1st meridian west – Meridian 1° west of Greenwich
• 180th meridian – Meridian 180° east or west of the Prime Meridian with which it forms a great circle...
See more• "Where the Earth's surface begins—and ends", Popular Mechanics, December 1930
• scanned TIFFs of the conference proceedings...
See moreWikipedia text under CC-BY-SA license Prime Meridian - GIS Wiki | The GIS Encyclopedia
Prime meridian - Wikipedia @ WordDisk
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