{ "culture": "en-US", "name": "NHAP81_CIR_75cm", "guid": "", "catalogPath": "", "snippet": "Black-and-white and color infrared aerial photographs obtained from an altitude of 40,000 feet over the United States that are available as medium or high resolution digital images. (1980-1989)", "description": "The National High-Altitude Photography (NHAP) program was coordinated by the USGS as an interagency project to acquire cloud-free aerial photographs at an altitude of 40,000 feet above mean terrain elevation. Two different camera systems were used to obtain simultaneous coverage of black-and-white (BW) and color infrared (CIR) aerial photographs over the conterminous United States. The color-infrared photographs were taken with an 8.25-inch focal length lens and are at a scale of 1:58,000. The black-and-white photographs were taken with a 6-inch focal length lens and are at a scale of 1:80,000. The NHAP program, which was operational from 1980 to 1989, consists of approximately 500,000 images. Photographs were acquired on 9-inch film and centered over USGS 7.5-minute quadrangles.", "summary": "Black-and-white and color infrared aerial photographs obtained from an altitude of 40,000 feet over the United States that are available as medium or high resolution digital images. (1980-1989)", "title": "NHAP81_CIR_75cm", "tags": [ "NHAP" ], "type": "Image Service", "typeKeywords": [ "ArcGIS Server", "Data", "Image Service", "Service" ], "thumbnail": "", "url": "https://imagery.geographic.texas.gov/server", "minScale": 5.91657527591555E8, "maxScale": 288895.277144, "spatialReference": "WGS_1984_Web_Mercator_Auxiliary_Sphere", "accessInformation": "Texas Geographic Information Office, USGS, NHAP", "licenseInfo": "None", "portalUrl": "", "_ssl": true }