USGS Imagery Only Large-scale Base Map Service from The National Map
Dates
Publication Date
2016
Time Period
2016
File Modification Date
2016-09-26 14:20:00
Citation
U.S. Geological Survey, 2016, USGS Imagery Only Large-scale Base Map Service from The National Map: USGS - National Geospatial Technical Operations Center (NGTOC).
Summary
The USGS Imagery Only Large service from The National Map (TNM) consists of National Agriculture Imagery Program (NAIP) and high resolution orthoimagery (HRO) that combine the visual attributes of an aerial photograph with the spatial accuracy and reliability of a map. Digital orthoimage resolution may vary from 6 inches to 1 meter. In the former resolution, every pixel in an orthoimage covers a six inch square of the earth’s surface, while in the latter resolution, one meter square is represented by each pixel. Many states contribute orthoimagery to The National Map, and the USGS also relies on a partnership with the U.S. Department of Agriculture's Farm Service Agency. The National Map viewer allows free downloads of public domain, [...]
Summary
The USGS Imagery Only Large service from The National Map (TNM) consists of National Agriculture Imagery Program (NAIP) and high resolution orthoimagery (HRO) that combine the visual attributes of an aerial photograph with the spatial accuracy and reliability of a map. Digital orthoimage resolution may vary from 6 inches to 1 meter. In the former resolution, every pixel in an orthoimage covers a six inch square of the earth’s surface, while in the latter resolution, one meter square is represented by each pixel. Many states contribute orthoimagery to The National Map, and the USGS also relies on a partnership with the U.S. Department of Agriculture's Farm Service Agency. The National Map viewer allows free downloads of public domain, 1-meter resolution orthoimagery in JPEG 2000 (jp2) format for the conterminous United States, with many urban areas and other locations at 1-foot (or better) resolution also in JPEG 2000 (jp2) format. For additional information on imagery products, go to https://lta.cr.usgs.gov/node/300 and https://lta.cr.usgs.gov/high_res_ortho/.
This dynamic map service provides visualization of the free data that is available for download from The National Map at http://viewer.nationalmap.gov.
