A digital orthophoto quadrangle (DOQ) is an aerial photograph. It has been orthorectified--altered so that it has the geometric properties of a map; DOQ's meet National Map Accuracy Standards. Thus the user can measure distances accurately on a DOQ.
igital rthophoto uad is a digital image of an aerial photograph in which displacements caused by the camera and the terrain have been removed. It combines the image characteristics of a photograph with the geometric qualities of a map. MORE
digital orthophoto quadrangle - Aerial photography of the Earth's surface, usually provided in GeoTIFF form, but also seen in other formats. A DOQ for a 7.5-min., 1:24000-scale quad is huge, thus the common use of DOQQ s--digital orthophoto quarter quadrangles.