GIS Lecture 4 : What is Geographic Coordinate System || Geoid Ellipsoid Latitude Longitude Altitude
"Geographic Coordinate Systems" and "Projected Coordinate Systems" in ArcGIS and ArcMap
How do geographical coordinates work?
A geographic coordinate system is a coordinate system used in geography that enables every location on Earth to be specified by a set of numbers, letters or symbols. The coordinates are often chosen such that one of the numbers represents a vertical position, and two or three of the numbers represent a horizontal position. A common choice of coordinates is latitude, longitude and elevation.
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