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    • Percent impervious surface for selected Chesapeake Bay watersheds

    Metadata Updated: January 16, 2026

    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.

    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.

    Downloads & Resources

    Dates

    Metadata Created Date January 13, 2026
    Metadata Updated Date January 16, 2026

    Metadata Source

    Harvested from DOI USGS DCAT-US

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date January 13, 2026
    Metadata Updated Date January 16, 2026
    Publisher U.S. Geological Survey
    Maintainer
    Identifier http://datainventory.doi.gov/id/dataset/USGS_577d689ee4b0ef4d2f43b473
    Data Last Modified 2020-08-18T00:00:00Z
    Category geospatial
    Public Access Level public
    Bureau Code 010:12
    Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
    Metadata Catalog ID https://ddi.doi.gov/usgs-data.json
    Schema Version https://project-open-data.cio.gov/v1.1/schema
    Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
    Datagov Dedupe Retained 20260116201601
    Harvest Object Id 587dafc0-1ff4-4548-b7a9-425049eb72c8
    Harvest Source Id 2b80d118-ab3a-48ba-bd93-996bbacefac2
    Harvest Source Title DOI USGS DCAT-US
    Metadata Type geospatial
    Old Spatial {"type": "Polygon", "coordinates": -80.55161394556775, 36.62479659512296, -80.55161394556775, 43.55759203025379, -74.2272808505554, 43.55759203025379, -74.2272808505554, 36.62479659512296, -80.55161394556775, 36.62479659512296}
    Source Datajson Identifier True
    Source Hash aaf9b10a17690c5e4340785fce18a8add5957bb63764d1bfbf3371a2ee8a6fe5
    Source Schema Version 1.1
    Spatial {"type": "Polygon", "coordinates": -80.55161394556775, 36.62479659512296, -80.55161394556775, 43.55759203025379, -74.2272808505554, 43.55759203025379, -74.2272808505554, 36.62479659512296, -80.55161394556775, 36.62479659512296}

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