| snippet:
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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) |
| summary:
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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) |
| accessInformation:
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Texas Geographic Information Office, USGS, NHAP |
| _ssl:
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true |
| thumbnail:
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| maxScale:
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288895.277144 |
| typeKeywords:
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["ArcGIS Server","Data","Image Service","Service"] |
| description:
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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. |
| licenseInfo:
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None |
| catalogPath:
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| title:
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NHAP81_CIR_75cm |
| type:
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Image Service |
| url:
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https://imagery.geographic.texas.gov/server |
| tags:
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["NHAP"] |
| culture:
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en-US |
| portalUrl:
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| name:
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NHAP81_CIR_75cm |
| guid:
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| minScale:
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5.91657527591555E8 |
| spatialReference:
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WGS_1984_Web_Mercator_Auxiliary_Sphere |