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**geographic coordinate system**( GCS) is a spherical or ellipsoidal**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 of spatial reference**systems**that are in use, and forms the basis for most others.For it, the Earth is cut up into 180 circles, from the Equator at 0°. The poles are at 90°, the North Pole is at 90° N (orth), the South Pole is at 90° S (outh). Places with the same latitude are on a circle, around the Earth. The other concept is called longitude (Long, or the Greek symbol "lambda", ), sometimes referred to as "meridian".

**Geographic****coordinate system**, the spherical**coordinates**of latitude and longitude Projected**coordinate****systems**, including thousands of cartesian**coordinate****systems**, each based on a map projection to create a planar surface of the world or a region.People also ask

How to create a custom geographic coordinate system?

What are geographic coordinate systems?

What is coordinate system in geography?

How did the geographic coordinate system originate?

- in geodetic Coordinates and Map
- Ptolemy's 2nd-century Geography Used The
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- The Cartographic Coordinate Systems
- Media Related to Geographic

History The invention of a geographic coordinate system is generally credited to

**Eratosthenes**of**Cyrene,**who composed his now-lost Geography at the Library of Alexandria in the 3rd century BC. A century later, Hipparchus of Nicaea improved on this system by determining latitude from stellar measurements rather than solar altitude and determining lo...Geodetic datum fIn order to be unambiguous about the direction of "vertical" and the "horizontal" surface above which they are measuring, map-makers choose a reference ellipsoid with a given origin and orientation that best ﬁts their need for the area to be mapped. They then choose the most appropriate mapping of the spherical coordinate system ont...

Map projection … fTo establish the position of a geographic location on a map, a map projection is used to convert geodetic coordinates to plane coordinates on a map; it projects the datum ellipsoidal coordinates and height onto a ﬂat surface of a map. The datum, along with a map projection applied to a grid of reference locations, establishes a gr...

3D Cartesian coordinates Every point that is expressed in ellipsoidal coordinates can be expressed as an rectilinear x y z (Cartesian) coordinate. Cartesian coordinates simplify many mathematical calculations. The Cartesian fsystems of different datums are not equivalent. Earth-centered, Earth-ﬁxed …

See also Decimal degrees – Angular measurements, typically for latitude and longitude Geographical distance – Distance measured along the surface of the earth Geographic information system – System to capture, manage and present geographic data f Geo URI scheme ISO 6709, standard representation of geographic point location by coordinates Linear ref...

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**wikipedia**.org/w/index.php? title=Geographic_**coordinate**_**system**&oldid=99652 9869"**Geographic****coordinate****system**-**Wikipedia**- Read online for**free**. ...**Language**.**English**(selected)Aug 05, 2021 · A

**geographic****coordinate****system**is a**coordinate****system**that enables every location on the Earth to be specified by a set of numbers or letters, or symbols.[n 1] The**coordinates**are often chosen such that one of the numbers represents vertical position, and two or three of the numbers represent horizontal position.