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  1. [navigation] Acronym for digital orthophoto quarter quadrangle. A digital orthophoto quadrangle (DOQ) divided into four quadrants. A 1-meter resolution digital orthorectified image basemap comprising an area measuring 3.75-minutes longitude by 3.75-minutes latitude, covering the United States at a scale of 1:12,000, in the UTM projection, referenced to the NAD 27 or NAD 83 datum, and may be black and white (B/W), natural color, or color infrared (CIR). Produced for, and distributed by, the United States Geological Survey (USGS).

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