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A geographic coordinate system ( GCS) is a spherical or geodetic coordinate system for measuring and communicating positions directly on the 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.
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A geographical coordinate system is a coordinate system. This means that every place can be specified by three sets of three numbers, called coordinates. A full circle can be divided into 360 degrees (or 360°); this was first done by the Babylonians; Ancient Greeks, like Ptolemy later extended the theory. Today, degrees are divided further.
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What is a geographic coordinate system?
What is a geographic coordinate system (GCS)?
Which coordinate system is used to measure latitude and longitude?
What are the different types of coordinate systems for georeferenced data?
Jul 1, 2022 · There are two main types of coordinate systems for georeferenced data: Geographic Coordinate Systems (GCS) based on latitude and longitude. A Geographic Coordinate System is a 3D reference system that uses latitude and longitude to define the location of a point on the Earth’s surface.
In geography, latitude is a coordinate that specifies the north – south position of a point on the surface of the Earth or another celestial body. Latitude is given as an angle that ranges from −90° at the south pole to 90° at the north pole, with 0° at the Equator.
A geographic coordinate system (GCS) uses a three-dimensional spherical surface to define locations on the earth. A GCS is often incorrectly called a datum, but a datum is only one part of a GCS. A GCS includes an angular unit of measure, a prime meridian, and a datum (based on a spheroid ).
In the UK (which uses OSGB36 ), Ireland, France and Germany, these datum will not be the coordinates used in Wikipedia ( WGS84) thus leading to differences of over 100m. See geographic coordinate system for more information. For country specific systems, such as the UK OS grid references, see here.
The geographic coordinate system is designed specifically to define positions on the Earth's roughly-spherical surface. Instead of the two linear measurement scales x and y, the geographic coordinate systems juxtaposes two curved measurement scales.
