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GRANIT Metadata for 1992 Digital Orthophoto Quadrangle - 1:12,000-Scale - Quad 104NW - NORTH HARTLAND

GRANIT Metadata for 1992 Digital Orthophoto Quadrangle - 1:12,000-Scale - Quad 104NW - NORTH HARTLAND

Title: 1992 Digital Orthophoto Quadrangle - 1:12,000-Scale - Quad 104NW - NORTH HARTLAND
Time Period of Content: 92/0512 Initial Publication Date: 1998
Originator: Complex Systems Research Center, University of New Hampshire
Abstract:
The data set contains 1:12,000-scale, 1-meter resolution, black & white orthophotoquads, compressed from TIFFs to MrSID format. Orthophotos combine the image characteristics of a photograph with the geometric qualities of a map. The primary digital orthophotoquad (DOQ) is a 1-meter ground resolution, quarter-quadrangle (3.75-minutes of latitude by 3.75-minutes of longitude) image. The geographic extent of the DOQ is equivalent to a standard quarter-quadrangle. The normal orientation of data is by lines (rows) and samples (columns). Each line contains a series of pixels ordered from west to east with the order of the lines from north to south. The radiometric image brightness values are stored as 256 gray levels ranging from 0 to 255. While the original USGS format for distribution of DOQs is TIFF images, GRANIT distributes the data in both MrSID and the original TIFF formats. The metadata record provided with the DOQ contains a wide range of descriptive information including format source information, production instrumentation and dates, and data to assist with displaying and georeferencing the image. In addition to this file, the original USGS header file, including source and coordination information, is available upon request. However, please note that it will not reflect processing completed at Complex Systems Research Center (see DATA_QUALITY_INFORMATION below).
Theme Keywords: DOQ, DOQQ, digital orthophoto, digital orthophotoquad, digital image map, aerial photograph, rectified photograph, rectified image, orthophoto, quarter-quadrangle orthophoto, 1-meter orthophoto, 3.75- x 3.75-minute orthophoto, 7.5- x 7.5-minute orthophoto
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