- The points on a photograph intersected by the bisector of the angle between the plumb line and the photograph perpendicular (i.e., where the principal axis meets the positive or negative plane). On a vertical photograph, the isocenter and photonadir point coincide with the principal point.
Aviation dictionary. 2014.
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isocenter — iso·center … English syllables
isocenter — ˈ ̷ ̷ ̷ ̷+ˌ noun Etymology: is + center : the point on an aerial photograph intersected by the bisector of the angle between the plumb line and the perpendicular to the photograph … Useful english dictionary
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