Digital orthophoto quadrangle

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An image from a part of a digital orthophoto quadrangle of Washington, DC

A digital orthophoto quadrangle[1] (DOQ) is aerial photography or satellite imagery that has been corrected so that its pixels are aligned with longitude and latitude lines, and have a narrowly defined region of coverage. This is a widely used format introduced by United States Geological Survey.[1] The correction technique is called rectification and is a large part of photogrammetry.[2]

See also


  1. 1.0 1.1 "USGS GeoData Digital Orthophoto Quadrangles" (PDF). USGS Fact Sheet 057-01. U.S. Geological Survey. May 2001. 
  2. "Introduction to Photogrammetry". The Aerial Archive. Institute for Prehistory and Protohistory of the University of Vienna. 

External links