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Digital Orthophoto Quadrangle (DOQ) combines the image characteristics of a photograph with the geometric qualities of a map. The primary digital orthophotoquad (DOQ) is a 1-meter ground resolution, quarter-quadrangle (3.75-minutes of latitude by 3.75-minutes of longitude) image cast on the Universal Transverse Mercator Projection (UTM) on the North American Datum of 1983
(NAD83). A DOQ is useful as a source or background layer in a GIS, as a means to perform quality assurance on other digital products, and as a source for the collection and revision of
other data.
Follow the links below to DOQ resources:
Live Data
ArcIMS Image Map Service
Downloadable GIS Data
Image
Map
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