DOQQ stands for Digital Orthophoto Quadrangle. A DOQQ generally shows an aerial photo
with UTM coordinates overlain. UTM
coordinates are a grid-based method of specifying locations on the surface of
the Earth. The DOQQ maps are
normally either black-and-white or color infrared, like the infrared aerial photos.
These DOQQ aerial photos are one-fourth
of the U.S. Geological Survey's 7.5-minute quadrangle. The above image is a
DOQQ map of Lake Kahola, a small water supply and recreational lake located in
the Flint Hills of east-central Kansas.
The map URL is: http://www.geospectra.net/kite/kahola/kahola.htm
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