An orthophoto, orthophotograph or orthoimage is an aerial photograph geometrically corrected (`orthorectified`) such that the scale is uniform: the photo has the same lack of distortion as a map. Unlike an uncorrected aerial photograph, an orthophotograph can be used to measure true distances, because it is an accurate representation of the Eart.....Found on http://en.wikipedia.org/wiki/Orthophoto
A copy of an image corrected for variations in scale and height displacements Cdetails ...Found on http://www.cryer.co.uk/glossary/o/index.htm
Photographic image, rectified to remove the distortions caused by variations in terrain height, resulting in an image in which all pixels are to the same scale.
Found on http://www.encyclo.co.uk/local/20195
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