Digital Orthophotography - A photo-quality digital image of surface features in their geometrically corrected, true map projection. The orthorectification process ties each pixel in a digital image to its true earth location.
orthophotograph - Aerial photographs that have been processed to correct for scale variations and image displacement resulting from relief or terrain variations and camera tilt.
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ESRI Dictionary ...
orthophotography: The process of aerial photographs that have been rectified to produce an accurate image of the Earth by removing tilt and relief displacements which occurred when the photo was taken.
Orthophotograph - "A photographic copy of a perspective photograph with distortions due to tilt and relief removed" (Bonham-Carter, 1994, p. 370).
orthophotograph
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.
Orthophotography first came into use in the 1960's, but they did not become commonplace until the 1970s due to cost. Digital Orthophotos are commonly used as a backdrop for vector digitizing.
Orthophotograph
The physical properties of conventional photographic equipment are such that the images created are inherently deformed from the nature of the feature they are attempting to capture.
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Orthophotography: An aerial photograph in which the distortions due to camera tilt and topographic relief have been removed. An orthophotograph has consistent scale throughout and can be used as a map.
digital orthophotography Orthophotography maintained in a digital form.
See Also: orthophotograph, transformation
[aerial photography] Acronym for digital orthophoto quadrangle. A computer-generated, uniform-scale image created from an aerial photograph.
Basics of Orthophotography
Aerial photographs contain distortion, because they do not maintain a constant scale across the image.
Ohio Digital Orthophotography Project
ODOT
Ohio Dept. of Transportation; Oregon Dept. of Transportation ...
map, orthophotographic See: orthophotographic map map, photographic See: photomap map, planimetric Map that presents only the horizontal positions for features represented.
orthophotograph-A vertical aerial photograph from which the distortions due to varying elevation, tilt, and surface topography have been removed, so that it represents every object as if viewed directly from above.
These may include such items as digital terrain data, orthophotographs, and satellite imagery. These data may provide tremendous capability, but must be managed in ways different from traditional vector information.
This model provides the basic lay of the land as interpreted from an orthophotograph and a georeferenced, scanned topographical map. Because we anticipate a lot of regrading of the site, our initial site model is not very detailed.
Vertical photography, some times called orthophotography, is used for photogrammetric mapping and requires a high degree of accuracy. 2.
Some population centers are also covered by aircraft imagery (orthophotography) with several pixels per meter.
Geoportal
Geoportals are e-commerce sites that allow browsing, viewing and procuring spatial databases and orthophotography online.
0-ft resolution Color / CIR Digital Orthophotography serves as the geo-coordinate base for the terrain database, due to its highly accurate geopositional characteristics, and is used as the base (RGB) layer for the visualization model.
Orthophotograph: A modified copy of a perspective photograph of the earth's surface with distortions due to tilt and relief removed.
 See also: Information, GIS, Digital, Geographic, Mapping
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