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Changes in imperviousness for U.S. urban areas, 1974-2012

Dates

Publication Date
Start Date
1974-01-01
End Date
2012-12-31

Citation

Falcone, J.A., 2018, Changes in imperviousness for U.S. urban areas, 1974-2012: U.S. Geological Survey data release, https://doi.org/10.5066/P975GGZQ.

Summary

This product consists of two sets of imperviousness calculations for 3,535 urban areas and urban clusters in the conterminous United States. Imperviousness is given as the percent of the area covered by impervious surfaces, such as roads, buildings, or parking lots. One set of calculations is for the time periods 2001, 2006, and 2011, based on the U.S. Geological Survey (USGS) National Land Cover Dataset (NLCD) imperviousness data layer. The second set of calculations is for the time periods 1974, 1982, 1992, 2002, and 2012, based on landuse-based coefficients from the USGS NAWQA Wall-to-wall Anthropogenic Landuse Trends (NWALT) product. Urban area boundaries are based on the U.S. Census Bureau 2015 Urban Areas boundaries. The Census [...]

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Attached Files

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Imperviousness_by_UrbanArea.xml
“Metadata”
Original FGDC Metadata

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18.56 KB
imperv_nlcd2001-2011.txt 175.24 KB
imperv_nwalt1974-2012.txt 215.35 KB
shapefile-Census-UAs-2015-CONUS.zip 10.77 MB

Purpose

These data are intended as a way to compare changes in urban areas over time, and to compare relative differences among cities. See Supplemental Info for recommended use of the data.

Map

Communities

  • USGS Data Release Products

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Additional Information

Identifiers

Type Scheme Key
DOI https://www.sciencebase.gov/vocab/category/item/identifier doi:10.5066/P975GGZQ

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