USGS Frequently Asked Questions

Question: What is a digital orthophoto quadrangle (DOQ)?

Answer:

A digital orthophoto quadrangle (DOQ) is a computer-generated image of an aerial photograph in which displacements caused by terrain relief and camera tilts have been removed. It combines the image characteristics of a photograph with the geometric qualities of a map.

Source of this FAQ:
http://mac.usgs.gov/isb/pubs/factsheets/fs12996.html

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