photograph nadir
McGraw-Hill Science & Technology Dictionary:
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photograph nadir
(¦fōd·ə¦graf·ik ′nā′dir)
(optics) The point at which a vertical line through the perspective center of a camera lens pierces the plane of the photograph. Also known as nadir point.
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photograph nadir
McGraw-Hill Dictionary of Aviation:
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nadir point
i. The same as nadir
ii. As it relates to aerial photogrammetry, it is the point where a plumb line dropped from the front nodal point pierces the photograph. This point is vertically beneath the exposure station. In the illustration, it is point N. Also called a photo nadir and a photo plumb point.
ii. As it relates to aerial photogrammetry, it is the point where a plumb line dropped from the front nodal point pierces the photograph. This point is vertically beneath the exposure station. In the illustration, it is point N. Also called a photo nadir and a photo plumb point.
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