A DOQQ map is a third type of USGS topoquad, and stands for Digital Orthoquarter Quads. DOQQ are georectified (have latitude and longitude coordinates) raster images developed from aerial photos. By using different types of film in cameras operating in the planes taking the photographs, DOQQ's can be produced and displayed as color-infrared photos or in true color. The above image is a DOQQ because it is a computer generated image of an aerial photography, and is displayed using color-infrared film.
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