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Longitude is a geographic coordinate that specifies the east–west position of a point on the surface of the Earth, or another celestial body. It is an angular measurement, usually expressed in degrees and denoted by the Greek letter lambda (λ). Meridians are imaginary semicircular lines running from pole to … 展开
The concept of longitude was first developed by ancient Greek astronomers. Hipparchus (2nd century BCE) used a coordinate system that assumed a spherical Earth, and … 展开
Longitude is given as an angular measurement with 0° at the Prime Meridian, ranging from −180° westward to +180° eastward. The … 展开
The main methods for determining longitude are listed below. With one exception (magnetic declination) they all depend on a common principle, which was to determine an absolute … 展开
• Andrews, William J. H. (1996). The Quest for Longitude. Cambridge, Massachusetts: Harvard University Press. ISBN 展开
CC-BY-SA 许可证中的维基百科文本 Geographic coordinate system - Wikipedia
The latitude ϕ of a point on Earth's surface is the angle between the equatorial plane and the straight line that passes through that point and through (or close to) the center of the Earth. Lines joining points of the same latitude trace circles on the surface of Earth called parallels, as they are parallel to the Equator and to each other. The North Pole is 90° N; the South Pole is 90° S. The 0° parallel of l…
Wikipedia · CC-BY-SA 许可下的文字经度 - 维基百科，自由的百科全书
网页使用 四分仪 （英语：Quadrant (instrument)） 或 星盘 可观测到太阳或某特定 恒星 在地平线上的高度，根据该高度可以计算出该位置的 纬度，但是经度的确定要更加复杂些。. 亚美 …
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Latitude - Wikipedia
在en.wikipedia.org上查看更多信息Two levels of abstraction are employed in the definitions of latitude and longitude. In the first step the physical surface is modeled by the geoid, a surface which approximates the mean sea level over the oceans and its continuation under the land masses. The second step is to approximate the geoid by a mathematically si…Latitude and longitude | Definition, Examples, Diagrams, & Facts
网页2024年7月30日 · Latitude and longitude, coordinate system by means of which the position or location of any place on Earth’s surface can be determined and described. Latitude is …
纬度 - 维基百科，自由的百科全书
网页地球真实表面上一点的纬度和其在参考表面上的对应点一致，过地球真实表面上一点作参考表面的法线，该法线与参考表面的交点即为真实表面上那一点的对应点。. 纬度，经度和遵循某种规范的高度共同组成了 ISO 19111 …
Longitude - Wikiwand articles
网页Longitude is a geographic coordinate that specifies the east–west position of a point on the surface of the Earth, or another celestial body. It is an angular m... English
Longitude - Simple English Wikipedia, the free encyclopedia
网页Longitude is a way to say where a place is on the Earth. It is measured starting from an imaginary north–south line called the Prime Meridian. (A meridian is an imaginary line …
Geographic coordinate system - Simple English Wikipedia, the free ...
网页The poles are at 90°, the North Pole is at 90° N (orth), the South Pole is at 90° S (outh). Places with the same latitude are on a circle, around the Earth. The other concept is …
History of longitude - Wikipedia
网页History of longitude. Monuments of International Longitude Determination at Sheshan Observatory, Shanghai. The history of longitude describes the centuries-long effort by astronomers, cartographers and navigators to …
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