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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.
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 ...
In cartography, a map projection is any of a broad set of transformations employed to represent the curved two-dimensional surface of a globe on a plane. [ 1][ 2][ 3] In a map projection, coordinates, often expressed as latitude and longitude, of locations from the surface of the globe are transformed to coordinates on a plane. [ 4][ 5 ...
v. t. e. Geodesy or geodetics[ 1] is the science of measuring and representing the geometry, gravity, and spatial orientation of the Earth in temporally varying 3D. It is called planetary geodesy when studying other astronomical bodies, such as planets or circumplanetary systems. [ 2]
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.
Module:Location map/data/United States Chicago metropolitan area is a location map definition used to overlay markers and labels on an equirectangular projection map of Chicago metropolitan area. 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.
An alternative map image, usually a relief map, which can be displayed via the relief or AlternativeMap parameters; top = 40 Latitude at top edge of map, in decimal degrees; bottom = 37.6 Latitude at bottom edge of map, in decimal degrees; left = -79.7 Longitude at left edge of map, in decimal degrees; right = -74.8 Longitude at right edge of ...