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Digital Orthophoto Quadrangles (DOQ)

January 2, 2018
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In 1998 the Upper Midwest Environmental Sciences Center (UMESC) began aquiring digital orthophoto quadrangles (DOQ) for the Upper Mississippi River floodplain to georeference the center's aerial photography and land cover/use data. As these data become available, the files are compressed and placed online so others can also use them.