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GRANIT Metadata for Impervious Surfaces in Coastal New Hampshire - 1990

GRANIT Metadata for Impervious Surfaces in Coastal New Hampshire - 1990

Title: Impervious Surfaces in Coastal New Hampshire - 1990
Time Period of Content: 09/08/1990 Initial Publication Date: 12/31/2002
Originator: Complex Systems Research Center, University of New Hampshire
Abstract:
Impervious surface acreage estimates for 1990 were developed for 48 towns in coastal NH, including the 43 towns within the designated Zones A and B of the NH Estuaries Project Area. Data were developed using a combination of subpixel and traditional image classification techniques applied to Landsat 5 Thematic Mapper (TM) imagery. Additionally, road centerline data from the NH Department of Transportation were "burned in" to the data to capture narrow, linear features where pavement exists. Impervious surface acreage is mapped in percent ranges by individual grid cell. Users may generate area estimates by factoring the cell size (8742.25 sq. ft. or .2 acres) by the low, midpoint, or high end of the assigned range. Two related data sets, Impervious Surfaces in Coastal New Hampshire - 2000 and Impervious Surfaces in Coastal New Hampshire - 2005, are also available. Derived from similar data and using similar techniques, they provide subsequent estimates of impervious surface coverage.
Theme Keywords: Impervious Surfaces, Land Cover, Land Use, Water Quality, Remote Sensing, Classification, Subpixel
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