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  1. 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. 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.

  2. Coordinate geografiche. Le linee verticali sono dette meridiani e servono a misurare la longitudine, le linee orizzontali sono dette paralleli e servono a misurare la latitudine. In geodesia le coordinate geografiche sono valori utili per individuare la posizione di un punto sulla superficie terrestre. Esse sono la latitudine, la ...

  3. 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.

  4. A spatial reference system (SRS) or coordinate reference system (CRS) is a framework used to precisely measure locations on the surface of Earth as coordinates. It is thus the application of the abstract mathematics of coordinate systems and analytic geometry to geographic space.