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Mar 10, 2024 · A geographic coordinate system defines

**two**-**dimensional****coordinates****based****on****the****Earth**’**s**surface. It has an**angular**unit of**measure**,**prime****meridian**, and datum (which contains the spheroid). As shown in the image below, lines of longitude have X-coordinates between -180 and +180 degrees.Mar 25, 2024 · Latitude and longitude,

**coordinate****system**by means of which the position or location of any place on Earth’s surface can be determined and described. Latitude is a measurement of location north or south of the Equator. Longitude is a similar measurement east or west of the Greenwich meridian.May 21, 2023 · The

**coordinate****system**used to define locations on the three-dimensional earth is the**geographic****coordinate****system**(GCS), based on a sphere or spheroid. A spheroid (a.k.a. ellipsoid) is simply a slightly wider sphere than it is tall and approximates the actual shape of the earth more closely.**Geographic****coordinate****systems**form the first level of defining where we are on the earth. All spatial data must first address the curved surface of the earth, thus all**coordinate****systems**will have a**geographic****coordinate****system**“core” that defines the spheroid, geoid, units of measure, and prime meridian on which all further measurements ...Oct 5, 2018 · A geographic coordinate system (GCS)

**defines****locations****on****the****earth****using****a****three**-**dimensional****spherical****surface**[**1**], it is**a****reference****system****that****uses****latitude****and****longitude****to****identify****locations****on****a****spheroid****or****sphere**. A**datum**,**prime****meridian**,**and****angular****unit**are**parts****of****a****GCS**[2] .Figure 2.11.1 The geographic coordinate system. Longitude specifies

**positions****east****and****west****as****the****angle****between****the****prime****meridian****and**a second**meridian**that intersects the point of interest. Longitude ranges from +180 (or 180° E) to -180° (or 180° W). 180° East and West longitude together form the International Date Line.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.