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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.
- Geodetic Datum
A geodetic datum or geodetic system (also: geodetic...
- Decimal Degrees
Decimal degrees (DD) is a notation for expressing latitude...
- Spatial Reference System
A spatial reference system (SRS) or coordinate reference...
- Geographical Distance
View from the Swabian Jura to the Alps. Geographical...
- Geodetic Datum
Geographic coordinate system. Map of Earth showing lines of latitude (horizontally) and longitude (vertically), Eckert VI projection; large version Archived 2016-12-25 at the Wayback Machine (pdf, 1.8MB) A geographical coordinate system is a coordinate system.
Coordinate Systems. A coordinate system is a standardized method for assigning codes to locations so that locations can be found using the codes alone. Standardized coordinate systems use absolute locations. In a coordinate system, the x-direction value is the easting and the y-direction value is the northing.
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What is a geographic coordinate system?
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May 21, 2023 · Coordinate systems are frameworks that are used to define unique positions. For instance, in geometry, we use x (horizontal) and y (vertical) coordinates to define points on a two-dimensional plane. The coordinate system used to define locations on the three-dimensional earth is the geographic coordinate system (GCS), based on a sphere or spheroid.
Geodetic coordinates. Geography (Ptolemy) Geohash. Geomagnetic latitude. German Naval Grid System. Global Area Reference System. Global Navigation Grid Code. Grid (spatial index) Projected coordinate system.
with “geographic coordinate system” (or a type of CRS used for specifying the location of a point on the earth). But a datum is only one component of a geographic coordinate system — albeit an indispensable one. To understand the purpose horizontal and vertical datums serve, we must first discuss two related con-cepts: ellipsoids and geoids.
Printed maps display coordinates plotted to the datum selected by the mapmakers. 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.
