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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. 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
Learn what a geographic coordinate system (GCS) is and how it uses longitude and latitude to locate points on the earth. Find out how GCS differs from a datum and how to measure angles and distances on a spherical surface.
Jul 1, 2022 · Learn about the definition, types, and units of geographic coordinate systems, which use latitude and longitude to locate points on the Earth's surface. Compare and contrast geographic and projected coordinate systems, and see examples of map projections.
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.
Mar 25, 2024 · Learn how to use latitude and longitude, a coordinate system that measures positions on Earth's surface. Find out the definitions, examples, diagrams, facts, and technical details of this system.
- The Editors of Encyclopaedia Britannica
Learn the basics of geographic coordinate systems, a type of coordinate system that uses latitude and longitude to describe point locations on a curved surface of the earth. Find out how to use datums, units of measure, and prime meridians to define the spheroid, geoid, and location of points on the surface. See examples of how to display and use geographic coordinate systems in ArcGIS.
Learn how the geographic coordinate system defines positions on the Earth's surface using longitude and latitude scales. See how the system differs from a Cartesian coordinate system and what are the advantages and limitations of using it.
