In photography, an omnidirectional camera (from "omni", meaning all), also known as 360-degree camera, is a camera having a field of view that covers at least a full circle (360°) in the horizontal plane, up to a full sphere (1 spat).Omnidirectional cameras are important in areas where large visual field coverage is needed, such as in panoramic photography and robotics.
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Spat (angular unit) in the context of Square degree
A square degree (deg) is a non-SI unit measure of solid angle. Other denotations include sq. deg. and (°). Just as degrees are used to measure parts of a circle, square degrees are used to measure parts of a sphere.
Analogous to one degree being equal to π/180 radians, a square degree is equal to (π/180) steradians (sr), or about 1/3283 sr or about 3.046×10 sr.The whole sphere has a solid angle of 4πsr which is approximately 41253 deg:
View the full Wikipedia page for Square degree