Digital Orthophoto Quarter Quads are aerial photographs submitted through the USGS. This is a photograph taken in Lago Vista, Texas and appears in flood insurance program. It helps residents identify the region they live in and if it is at risk for flood.
http://www.crwr.utexas.edu/gis/gishydro00/Class/trmproj/Donnelly/termproject_files/1_Red_DOQQ.jpe
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