GIS Dictionary
Definitions for GIS terms related to operations such as analysis, GIS modeling and web-based GIS, cartography, and Esri software.
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axis
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[coordinate systems]
A line along which measurements are made in order to determine the coordinates of a location. 
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[coordinate systems]
In a spherical coordinate system, the line that directions are related to and from which angles are measured. -
[astronomy]
In astronomy, the imaginary line through the poles about which a rotating body turns.
