National Aerial Photography Program (NAPP)
Entry ID: NAPP

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Summary
Abstract: The National Aerial Photography Program (NAPP) is an interagency
Federal effort coordinated by the USGS, which uses NAPP products to
revise maps. Other agencies have varied uses for these photographs,
which, are taken on a 5- to 7-year cycle and produced to rigorous
specifications. The NAPP program encompasses each of the lower 48
states and Hawaii. The photos are acquired from airplanes flying at
an altitude of 20,000 feet using a 6 inch focal length camera
resulting in a scale of 1:40,000. Each 9-by 9-inch photo (without
enlargement) covers an area of slightly more than 5 miles on each
side. Flightlines for the NAPP program are flown in a north-to-south
direction through the east and west halves of 7.5-minute
quadrangles.

Purpose: The original purpose of the NAPP program which was established in
1987, was to provide the USGS with accurate and cloud-free
photographs that would assist them in the creation and revision of
USA topographic maps.
Related URL
Description: Dataset searching and ordering capabilities are available
through EarthExplorer at the above URL.
Geographic Coverage
Spatial coordinates   
  N: 49.0   S: 24.0   E: -66.0   W: -126.0

Data Set Citation
Dataset Originator/Creator: U.S. Geological Survey (USGS) EROS Data Center (EDC)
Dataset Title: National Aerial Photography Program (NAPP)
Dataset Release Place: Sioux Falls, SD
Dataset Publisher: U.S. Geological Survey
Data Presentation Form: Photograph
Online Resource: http://earthexplorer.usgs.gov
Temporal Coverage
Start Date: 1987-01-01
Quality Process_Description:
NAPP photographs are obtained on 9-inch film from an altitude of
20,000 feet above mean terrain elevation, and are centered on quarters
of 7.5-minute quadrangles. Strict specifications regarding sun angle,
cloud cover, minimal haze, stereoscopic coverage, and image inspection
were followed.

Process_Date: 19971014

Cloud_Cover: All NAPP photography is cloud-free.
Access Constraints None
Use Constraints There is no guarantee of warranty concerning the accuracy of these data. Users should be aware that temporal changes may have occurred since the data was collected and that some parts of these data may no longer represent actual surface conditions. Users should not use these data for critical applications without a full awareness of their limitations. Acknowledgement of the originating agencies would be appreciated in products derived from these data. Any user who modifies the data set is obligated to describe the types of modifications they perform. User specifically agrees not to misrepresent the data set, nor to imply that changes made were approved or endorsed by the U.S. Geological Survey. Please refer to http://www.usgs.gov/privacy.html for the USGS disclaimer.
Data Set Progress
IN WORK
Originating Center
Data Center
Earth Resources Observation and Science Center, U.S. Geological Survey, U.S. Department of the Interior Supplemental Info
Data Center URL: http://eros.usgs.gov/
Dataset ID: NAPP

Data Center Personnel
Name: EROS CENTER
Phone: 605-594-6151, 800-252-4547
Fax: 605-594-6589
Email: lta at usgs.gov
Contact Address:
LTA Customer Services
U.S. Geological Survey
EROS Center
47914 252nd Street
City: Sioux Falls
Province or State: SD
Postal Code: 57198-0001
Country: USA
Distribution
Distribution Media: Black & White positive film
Distribution Size: 9-inch product
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Personnel
Role: DIF AUTHOR
Phone: 605-594-6594
Fax: 605-594-6151
Email: lta at usgs.gov
Contact Address:
Long Term Archive
USGS EROS Center
U.S. Geological Survey
City: Sioux Falls
Province or State: SD
Postal Code: 57198-0001
Country: USA
Extended Metadata Properties
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Creation and Review Dates
DIF Creation Date: 2000-08-22
Last DIF Revision Date: 2006-10-06
Future DIF Review Date: 2002-08-01
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