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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: 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.
The history of longitude describes the centuries-long effort by astronomers, cartographers and navigators to discover a means of determining the longitude of any given place on Earth. The measurement of longitude is important to both cartography and navigation. In particular, for safe ocean navigation, knowledge of both latitude and longitude ...
The default map image, without "Image:" or "File:" image1 = USA Florida relief location map.jpg An alternative map image, usually a relief map, which can be displayed via the relief or AlternativeMap parameters; top = 31.2 Latitude at top edge of map, in decimal degrees; bottom = 24.3 Latitude at bottom edge of map, in decimal degrees; left ...
Graticule (cartography) A graticule (from Latin crāticula 'grill/grating'), on a map, is a graphical depiction of a coordinate system as a grid of lines, each line representing a constant coordinate value. [ 1 ] It is thus a form of isoline, and is commonly found on maps of many kinds, at scales from local to global.
Module:Location map/data/Indonesia Jakarta is a location map definition used to overlay markers and labels on an equirectangular projection map of Jakarta. The markers are placed by latitude and longitude coordinates on the default map or a similar map image.
Location map of Mexico. / 23.75; -102.4. Module:Location map/data/Mexico is a location map definition used to overlay markers and labels on an equirectangular projection map of Mexico. The markers are placed by latitude and longitude coordinates on the default map or a similar map image.
Location map of Chicago. / 41.88745; -87.6698. Module:Location map/data/United States Chicago is a location map definition used to overlay markers and labels on an equirectangular projection map of Chicago. The markers are placed by latitude and longitude coordinates on the default map or a similar map image.