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| USGS › Geography › Earth Resources Observation and Science (EROS) Center |
Color-infrared NAPP Photo |
Black & White NAPP Photo |
The National Aerial Photography Program (NAPP) provides a standardized set of cloud-free aerial photographs covering the conterminous United States over 5 to 7 year cycles. The program began in 1987 and ended in 2004.
The photographs were acquired from an altitude of 20,000 feet and are available in black & white (B/W) or color-infrared (CIR), depending on location and date. Each photo is centered on one-quarter section of a 7.5-minute USGS quadrangle and covers an area about 5.5 x 5.5 miles.
After October 1, 2009, the USGS film archive collections will be systematically scanned to a standard format High Resolution 25 micron digital image (excluding Declassified Satellite Imagery which will be scanned to 7 micron) and also offered to the public at no charge.
Obviously, the task to create, store and distribute millions of High Resolution Scanned Photographic imagery is extremely challenging, costly and time consuming. With just consideration to the portion of the film collection that will receive highest scanning priority because physical vinegar syndrome deterioration risk, we have an expected 3 to 4 years of work. A scanning plan will be posted on the USGS EROS website with sufficient detail to allow users to review the overall schedule. It will show which collection are currently being worked on, and what progress has been made.
National Aerial Photography Program (NAPP) and National High Altitude Photography (NHAP) will have a lower priority in the scanning schedule and therefore not available for on request scanning for the EROS archive. However, the medium resolution data for these and other film collections will continue to be offered for download at no charge. If High Resolution Scanned images are required for the NAPP and NHAP data sets, we encourage customers to contact the USDA’s Aerial Photography Field Office (APFO) for information on their products, prices, and services (http://www.apfo.usda.gov).
The file sizes are about 15 megabytes for black and white images and 40 megabytes for color images. The files are stored in TIFF format. The medium-resolution files are created at about 400 dpi.
All of the NAPP and NHAP imagery have been digitized. Products can be downloaded through EarthExplorer or GloVis.
NAPP and NHAP photography may also be ordered through the USDA Aerial Photography Field Office (APFO)
Businesses that can provide printed images from USGS digital data.
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