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    • EJ and Impervious Cover

    Metadata Updated: March 27, 2025

    Geographic analysis of impervious cover and demographic attributes by 2010 Census block group. Demographic attributes and Census block groups were downloaded from the EJScreen web page (www.epa.gov/ejscreen). EJScreen technical documentation is available at website; click on the technical information link on the landing page; the link of the documentation is in the center of the web page. NLCD2019 data for impervious cover were downloaded from www.mrlc.gov. The impervious cover for 2001 and 2019 in the NLCD2019 database were used in the analysis. The Census block groups downloaded from EJScreen were projected into Albers Conic Equal Area to match the NLCD2019 projection (Albers Conic Equal Area: central meridian=96.0 W; origin latitude=23.0 N; false easting=0.0; false northing=0.0; standard parallel 1=29.5 N; standard parallel 2=49.5 N; Geographic coordinate system=WGS84; WKID=4326) .

    Access & Use Information

    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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    Dates

    Metadata Date May 31, 2023
    Metadata Created Date March 27, 2025
    Metadata Updated Date March 27, 2025
    Reference Date(s) January 9, 2023 (publication)
    Frequency Of Update

    Metadata Source

    Harvested from Environmental Dataset Gateway ISO Geospatial Metadata

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Date May 31, 2023
    Metadata Created Date March 27, 2025
    Metadata Updated Date March 27, 2025
    Reference Date(s) January 9, 2023 (publication)
    Responsible Party U.S. Environmental Protection Agency, Office of Research and Development, Center for Public Health and Environmental Assessment (Publisher)
    Contact Email
    Guid 9e1265d8-13c1-4563-a867-20a300aa6987
    Access Constraints
    Bbox East Long -66.103258
    Bbox North Lat 51.42191
    Bbox South Lat 23.360434
    Bbox West Long -127.700452
    Coupled Resource
    Frequency Of Update
    Harvest Object Id cf0056ef-53a0-4204-b5f6-5370c66cc226
    Harvest Source Id 9b3cd81e-5515-4bb7-ad3c-5ae44de9b4bd
    Harvest Source Title Environmental Dataset Gateway ISO Geospatial Metadata
    Licence None
    Lineage EJScreen attribute analyzed were percentage minority, percentage low income, percentage without a high school diploma, percentage linguistically isolated (difficulty with English), percentage of houses built before 1960, percentage over 64 years old, and percentage under 5 years old. Geographic patterns of these attributes were analyzed with respect to percentage impervious cover using a contingent probability model. Impervious cover attributes included in the analyses were percentage impervious cover in 2019 and percentage change in impervious cover between 2001 and 2019.
    Metadata Language eng
    Metadata Type geospatial
    Old Spatial {"type": "Polygon", "coordinates": [[[-127.700452, 23.360434], [-66.103258, 23.360434], [-66.103258, 51.42191], [-127.700452, 51.42191], [-127.700452, 23.360434]]]}
    Progress
    Spatial Data Service Type
    Spatial Reference System EPSG:4326
    Spatial Harvester True
    Temporal Extent Begin 2020-11-25T00:00:00

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