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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. 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
The World Geodetic System (WGS) is a standard used in cartography, geodesy, and satellite navigation including GPS. The current version, WGS 84, defines an Earth-centered, Earth-fixed coordinate system and a geodetic datum, and also describes the associated Earth Gravitational Model (EGM) and World Magnetic Model (WMM).
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What is a geographic coordinate system?
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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.
The World Geodetic System ( WGS) is a standard for use in cartography, geodesy, and navigation including GPS . It comprises a standard coordinate system for the Earth, a standard for raw altitude data, and a geoid that defines the nominal sea level. The latest revision is WGS 84 . Categories: Geocodes.
degrees S (those nearest the poles) are excluded from the UTM system. Various free online converters will translate between UTM and lat/long, but use them with caution: many of these converters only work for points in the northern hemisphere. Take a look at the map below. The UTM zones for Haiti are 17N and 18N. UTM zones for Africa range
The World Geographic Reference System (GEOREF) is a geocode, a grid-based method of specifying locations on the surface of the Earth. GEOREF is essentially based on the geographic system of latitude and longitude, but using a simpler and more flexible notation.
Geoid. Mathematical figure of the Earth. Shape of average ocean surface across the entire Earth. Smoother than actual Earth’s surface, but highly irregular due to local variations in gravity. Ellipsoid. Elongated sphere used to represent the Geoid. Used for mapping purposes. +/- 110m variation from Geoid. Geodesy.
