true horizon


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Related to true horizon: horizon line

true horizon

[′trü hə′rīz·ən]
(optics)
The boundary of a horizontal plane passing through a point of vision, or in photogrammetry, the perspective center of a lens system.

true horizon

i. The boundary of a horizontal plane passing through a point of the observer's vision.
ii. In photogrammetry, the boundary of a horizontal plane passing through the perspective center of a lens system.