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Longitude: The True Story of a Lone Genius Who Solved the Greatest Scientific Problem of His Time is a 1995 best-selling book by Dava Sobel about John Harrison, an 18th-century clockmaker who created the first clock (chronometer) sufficiently accurate to be used to determine longitude at sea—an important development in navigation.
A diagram of a typical nautical sextant, a tool used in celestial navigation to measure the angle between two objects viewed by means of its optical sight. Celestial navigation, also known as astronavigation, is the practice of position fixing using stars and other celestial bodies that enables a navigator to accurately determine their actual current physical position in space or on the ...
Longitude lines are perpendicular to and latitude lines are parallel to the Equator. A geographic coordinate system ( GCS) is a spherical or geodetic coordinate system for measuring and communicating positions directly on Earth as latitude and longitude. [1] It is the simplest, oldest and most widely used of the various spatial reference ...
Latitude and longitude coordinates on maps are usually expressed in degrees. In the given forms of the formulae below, one or more values must be expressed in the specified units to obtain the correct result. Where geographic coordinates are used as the argument of a trigonometric function, the values may be expressed in any angular units ...
Adrift Just Off the Islets of Langerhans. " Adrift Just Off the Islets of Langerhans: Latitude 38° 54' N, Longitude 77° 00' 13" W " is a 1974 science fiction novelette by Harlan Ellison. It was originally published in The Magazine of Fantasy & Science Fiction in October 1974, and subsequently republished in Ellison's 1975 collection of god ...
Module:Location map/data/USA Pittsburgh is a location map definition used to overlay markers and labels on an equirectangular projection map of Pittsburgh. The markers are placed by latitude and longitude coordinates on the default map or a similar map image.
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Module:Location map/data/USA Washington, D.C. is a location map definition used to overlay markers and labels on an equirectangular projection map of Washington, D.C.. The markers are placed by latitude and longitude coordinates on the default map or a similar map image.