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DIGITAL ORTHOPHOTO QUADRANGLES (DOQ) |
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Source: Nebraska Department of Natural Resources Processed by: Data Bank (JH) A Digital Orthophoto (Quarter) Quadrangle, also known as DOQ, is a rectified digital image of an aerial photograph with distortion and displacements removed and corrected for aircraft pitch, yaw and altitude, camera tilt, and terrain relief, thus conforming to the properties of an orthographic projection. The finished product is a spatially accurate image with ground features represented in their true planimetric positions. A DOQ is, therefore, a computer-generated image of an aerial photograph that combines the image characteristics of a photograph with the geometric qualities of a map. Also, the orthophoto coverage is a GIS product that can be overlaid and manipulated like any other coverage or layer, and offers significant flexibility. Following Information Resources are available:
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