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Steradian - definition(s)

steradian - [Euclidean geometry] The solid (conical) angle subtended at the center of a sphere of radius r by a bounded region on the surface of the sphere having an area r squared. There are 4π steradians in a sphere.


[Category=Geospatial ]

Source: esri, 31 August 2012 07:29:05, External 

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