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Coefficient-based consistent mapping of imperviousness in the conterminous U.S. at 60-m resolution for 1974, 1982, 1992, 2002, and 2012

Metadata Updated: October 29, 2023

Anthropogenic impervious surfaces affect hydrology, water quality, and ecological health and are widely studied. Previous studies have been limited, however, by a lack of consistent representation of imperviousness nationally as a time series prior to 2001. This product presents estimated imperviousness at 60-meter spatial resolution, for the time periods 1974, 1982, 1992, 2002, and 2012. The mapping was derived by comparing imperviousness from the National Land Cover Database (NLCD) 2011 to national land use from the 2012 U.S. Geological Survey NAWQA Wall-to-wall Anthropogenic Land Use Trends (NWALT) product. The NWALT land use product includes a series of 60-m national rasters, containing 18 land use classes, for five time periods from 1974-2012. Coefficients of imperviousness were derived for each land use class for 2012, and then re-mapped back to the NWALT previous eras of 2002, 1992, 1982, and 1974. The impervious mapping is facilitated by the 7-class urban detail of the NWALT land use product. Coefficients were derived for each of 909 Census Core-Based Statistical Areas (CBSAs) in the conterminous U.S., and were thus tailored to the characteristics of specific metropolitan and rural areas. When measured over HUC-12 watershed areas, the coefficients provided very similar 2002 imperviousness estimates to those from the 2001 NLCD: r2 (RMSE) of 0.93 (0.6), and 96% of HUC-12s mapped to within 1% of their actual imperviousness value. The resultant rasters provide a tool from which consistent measurements of imperviousness can be made for zonal or watershed areas in the conterminous U.S. for the last 4 decades.

Access & Use Information

Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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Metadata Created Date June 1, 2023
Metadata Updated Date October 29, 2023

Metadata Source

Harvested from DOI EDI

Additional Metadata

Resource Type Dataset
Metadata Created Date June 1, 2023
Metadata Updated Date October 29, 2023
Publisher U.S. Geological Survey
Identifier USGS:58701618e4b01a71ba0c5fe6
Data Last Modified 20220805
Category geospatial
Public Access Level public
Bureau Code 010:12
Metadata Context
Metadata Catalog ID
Schema Version
Catalog Describedby
Harvest Object Id 891d0912-d3a2-4bb8-ab98-b9643d00bdaa
Harvest Source Id 52bfcc16-6e15-478f-809a-b1bc76f1aeda
Harvest Source Title DOI EDI
Metadata Type geospatial
Old Spatial -127.977345175,22.768690319,-65.25298988,50.6283256
Publisher Hierarchy White House > U.S. Department of the Interior > U.S. Geological Survey
Source Datajson Identifier True
Source Hash e138f0a9d31e35cfc0c524b948fffc04af044987b810f3fd6e8e91d6365505d7
Source Schema Version 1.1
Spatial {"type": "Polygon", "coordinates": -127.977345175, 22.768690319, -127.977345175, 50.6283256, -65.25298988, 50.6283256, -65.25298988, 22.768690319, -127.977345175, 22.768690319}

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