NHAP = National High-Altitude Aerial Photography: 1980 - 1989
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'The National High Altitude Photography (NHAP) program, which was operated from 1980-1989, was coordinated by the U.S. Geological Survey as an interagency project to...
1980年至1989年实施的国家高空摄影（National High Altitude Photography, NHAP）计划，由美国地质调查局（U.S. Geological Survey）牵头作为跨机构项目进行协调统筹，旨在……
