orthophotograph

orthophotograph

[‚ȯr·thə′fōd·ə‚graf] (geology) A photographic copy, prepared from a photograph formed by a perspective projection, in which the displacements due to tilt and relief have been removed.

orthophotograph

(Data West Research Agency definition: see GIS glossary.) An aerial photograph in which the displacement of images has been removed and that has the distortion due to tilt, curvature, and ground relief corrected. It is a "scale corrected" aerial image, depicting ground features in their exact ground positions, in which distortion caused by camera and flight characteristics and relief displacement have been removed using photogrammetric techniques.