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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 ...
v. t. e. 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 systems that are in use, and forms the basis for most others.
Longitude at left edge of map, in decimal degrees; right = 120 Longitude at right edge of map, in decimal degrees; Precision. Longitude: from West to East this map definition covers 12 degrees. At an image width of 200 pixels, that is 0.06 degrees per pixel. At an image width of 1000 pixels, that is 0.012 degrees per pixel. Latitude: from North ...
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 ...
Address geocoding, or simply geocoding, is the process of taking a text-based description of a location, such as an address or the name of a place, and returning geographic coordinates, frequently latitude/longitude pair, to identify a location on the Earth's surface. [ 1] Reverse geocoding, on the other hand, converts geographic coordinates to ...
Name used in the default map caption; image = Location map Washington DC Cleveland Park to Southwest Waterfront.png The default map image, without "Image:" or "File:" top = 38.9375 Latitude at top edge of map, in decimal degrees; bottom = 38.8591 Latitude at bottom edge of map, in decimal degrees; left = -77.0886 Longitude at left edge of map ...
Location map of Central America. / 12.5; -85. Module:Location map/data/Central America is a location map definition used to overlay markers and labels on an equirectangular projection map of Central America. The markers are placed by latitude and longitude coordinates on the default map or a similar map image.
The default map image, without "Image:" or "File:" image1 = USA Washington relief location map.jpg An alternative map image, usually a relief map, which can be displayed via the relief or AlternativeMap parameters; top = 49.2 Latitude at top edge of map, in decimal degrees; bottom = 45.3 Latitude at bottom edge of map, in decimal degrees; left ...