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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.
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.
A slow motion of Earth's axis, precession, causes a slow, continuous turning of the coordinate system westward about the poles of the ecliptic, completing one circuit in about 26,000 years. Superimposed on this is a smaller motion of the ecliptic, and a small oscillation of the Earth's axis, nutation. [3] [4]
Location map of North Carolina. / 35.15; -79.85. Module:Location map/data/USA North Carolina is a location map definition used to overlay markers and labels on an equirectangular projection map of North Carolina. The markers are placed by latitude and longitude coordinates on the default map or a similar map image.
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.
image = Map of Boston and Cambridge.png The default map image, without "Image:" or "File:" top = 42.38403 Latitude at top edge of map, in decimal degrees; bottom = 42.32806 Latitude at bottom edge of map, in decimal degrees; left = -71.12314 Longitude at left edge of map, in decimal degrees; right = -71.0216 Longitude at right edge of map, in ...
An alternative map image, usually a relief map, which can be displayed via the relief or AlternativeMap parameters; top = 33.2 Latitude at top edge of map, in decimal degrees; bottom = 28.7 Latitude at bottom edge of map, in decimal degrees; left = -94.2 Longitude at left edge of map, in decimal degrees; right = -88.6 Longitude at right edge of ...