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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declination
See Also:
celestial sphere,
magnetic declination
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[coordinate systems]
In a spherical coordinate system, the angle between the equatorial plane and a line to a point somewhere on the sphere. 
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[coordinate systems]
The arc between the equator and a point on a great circle perpendicular to the equator. -
[astronomy]
The angular distance between a star or planet and the celestial equator.
