Second Generation Digital Orthophoto Quads

The 1^st generation digital orthophoto (DOQ) product provided Missouri with its’ first statewide digital mapping base and has become one of the most frequently used and relied upon digital spatial coverages.  Historically, NRI has used National Aerial Photography Program (NAPP) photography and more recently, National Digital Orthophoto Program (NDOP) DOQs as a map base for PSU support maps.  A variety of ortho map products derived from NAPP imagery have been used in the National Cooperative Soil Survey Program dating back to the mid 1970’s and DOQs are routinely used in Customer Service Tool Kit.

The 2^nd generation DOQs are not the standard NAPP/NOPD product.  Acquisition was coordinated through Missouri’s GIS Advisory Committee and contracted by the State of Missouri to produce a 1 meter, true ortho DOQ  cost-shared by the FSA National Aerial Photography Program (NAIP), the State of Missouri and NRCS. In Missouri, this product replaces FSA’s 2 meter “ortho–lite” and 35mm imagery used in the agency’s compliance program.  Built around NAIP specifications (true color film, leaf-on acquisition, 10% allowable cloud cover), the imagery and DOQs basic characteristics are:

• High resolution color infrared film
• Acquisition at 20,000 feet.
• Contact scale of 1:40,000.
• Softcopy aerotriangulation  (AT), using airborne GPS (ABGPS) and ground control points for maximum accuracy.
• Scan yielding ground sample distance (GSD) of 1 meter, NAD 83, UTM
• Leaf-on acquisition
• State contracted procurement

Copies of this imagery have been delivered to the Iowa ICCS and it will form the base for Missouri's 2004 PSU support maps.

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