National Mapping Program. Fact Sheet: Black and White Photographs. NHAP (National High Altitude Photography Program)

摘要

Since 1980, the multiagency National High-Altitude Photography (NHAP) program has obtained both 1:80,000-scale black-and-white and 1:58,000-scale color-infrared photographs taken at an altitude of 40,000 feet. Photocoverage of the conterminous United States under NHAP will be completed in FY 1988. As a result of the continuing assessment of Federal and State agency needs for multipurpose aerial photography, the participating Federal agencies have redesigned the former NHAP program to meet current requirements for higher resolution photographs. The new program is called the National Aerial Photography Program. Color-infrared photographs are being acquired at a scale of 1:40,000 from an altitude of 20,000 feet using a 6-inch focal length camera.