Photograph obtained from the orthogonal (i.e., horizontal) projection of a correctly oriented stereoscopic model formed by two overlapping aerial photographs; an orthophoto is free of tilt and relief displacements.
An orthophoto is a photo map compiled from a series of stereoscopic photographs by a special plotter having the capability to remove tilt, topographic displacement, and variations in scale. It is property referred to as an orthophoto map.
Are photos that have been fitted into a standard map projection so that they contain the qualities of both maps and photographs. Like maps, they have only one scale, which allows for accurate measurements of distances, angles, and areas to be made directly from their surface. Like photographs they depict features as they truly are (without any symbolization).
a digital image that is produced by making geometric Aerial Photography in French Polynesia in French Polynesia French Polynesia from the Sky Aerial Photography in French Polynesia Aerial Photography - Amos Nachoum Aerial Photography
an photograph that has been corrected for terrain/elevation variations, camera and sun angle, and registered to the earth's surface (imagine a jigsaw puzzle of the world and each image knows it's position in the puzzle)
a completely rectified copy of an original photograph. All variations in scale and displacements, due to relief, have been eliminated, hence the name ortho (correct) photography. Orthorphoto and orthophoto map are synonymous, an orthophoto is, very simply, a photo map.
A perspective aerial photograph contains image displacements caused by the tilting of the camera and terrain relief ( topography). It does not have a uniform scale. Distances cannot be measured on a conventional aerial photograph like one can do on a map. In an orthophoto the effects of tilt and relief are removed from the aerial photograph by the rectification process. Therefore an orthophoto is a uniform-scale photograph or photographic map. Since an orthophoto has a uniform scale, it is possible to measure directly on it like other maps. An orthophoto may serve as a base map onto which other map information may be overlaid (Source: U.S. Geological Survey)
An orthophoto or orthophotograph is an aerial photograph that has been geometrically corrected ("orthorectified") such that the scale of the photograph is uniform, meaning that the photo can be considered equivalent to a map. Unlike an aerial photograph, an orthophotograph can be used to measure true distances, because it is an accurate representation of the earth's surface, having been adjusted for topographic relief, lens distortion, and camera tilt.