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Percent impervious surface for selected Chesapeake Bay watersheds

Published by U.S. Geological Survey | Department of the Interior | Metadata Last Checked: January 07, 2026 | Last Modified: 2020-08-18T00:00:00Z
This dataset contains watershed means of estimated percent impervious surfaces for three time periods: 1992, 2002, and 2012. Estimates are based on coefficients derived from comparing land use of the 2012 NAWQA Wall-to-wall Anthropogenic Land-use Trends (NWALT) product to the 2011 National Land Cover Database (NLCD) imperviousness, then applying those coefficients to previous years (1974-2002) of the NWALT dataset.

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Complete Metadata

bureauCode 
[
  "010:12"
]
identifier http://datainventory.doi.gov/id/dataset/USGS_577d689ee4b0ef4d2f43b473
spatial -80.55161394556775, 36.62479659512296, -74.2272808505554, 43.55759203025379
theme 
[
  "geospatial"
]

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