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    • The LakeCat Dataset: Accumulated Attributes for NHDPlusV2 (Version 2.1) Catchments for the Conterminous United States: Surficial Lithology in Watershed

    Metadata Updated: February 5, 2025

    This dataset represents the density of 18 USGS lithology classes within individual local and accumulated upstream catchments for NHDPlusV2 Waterbodies. Catchment boundaries in LakeCat are defined in one of two ways, on-network or off-network. The on-network catchment boundaries follow the catchments provided in the NHDPlusV2 and the metrics for these lakes mirror metrics from StreamCat, but will substitute the COMID of the NHDWaterbody for that of the NHDFlowline. The off-network catchment framework uses the NHDPlusV2 flow direction rasters to define non-overlapping lake-catchment boundaries and then links them through an off-network flow table. This data set is derived from the USGS raster map of 18 lithology classes (categorical data type) for the conterminous USA. The map was produced based on texture, internal structure, thickness, and environment of deposition or formation of materials. These 18 lithology classes were summarized by local catchment and by watershed to produce 18 local catchment-level and watershed-level metrics as a categorical data type.

    Access & Use Information

    Public: This dataset is intended for public access and use. License: See this page for license information.

    Downloads & Resources

    References

    https://www.epa.gov/node/276204
    https://edg.epa.gov/metadata/catalog/search/resource/details.page?uuid=70CB7CB9-A915-48F6-A3DE-BE62446A454E

    Dates

    Metadata Created Date October 3, 2023
    Metadata Updated Date February 5, 2025
    Data Update Frequency R/P3Y

    Metadata Source

    Harvested from LakeCat Harvest

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date October 3, 2023
    Metadata Updated Date February 5, 2025
    Publisher U.S. Environmental Protection Agency, Office of Research and Development (ORD), Center for Public Health and Environmental Assessment (CPHEA), Pacific Ecological Systems Division (PESD),
    Maintainer
    Identifier 70CB7CB9-A915-48F6-A3DE-BE62446A454E
    Data First Published 2015-04-23
    Language en-US
    Data Last Modified 2023-11-13
    Rights public (Data asset is or could be made publicly available to all without restrictions)
    Category environment
    Public Access Level public
    Data Update Frequency R/P3Y
    Bureau Code 020:00
    Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
    Metadata Catalog ID https://edg.epa.gov/data/Public/ORD/NHEERL/WED/NonGeo/LakeCat.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
    Data Quality True
    Data Dictionary https://www.epa.gov/national-aquatic-resource-surveys/lakecat-metrics-and-definitions
    Data Dictionary Type text/html
    Harvest Object Id 93044452-0153-4dbf-939f-54311a8927d5
    Harvest Source Id 54618c4c-64b6-4a3b-9748-ad612299d8a0
    Harvest Source Title LakeCat Harvest
    Homepage URL https://www.epa.gov/national-aquatic-resource-surveys/lakecat-dataset
    License https://edg.epa.gov/EPA_Data_License.html
    Old Spatial -125.0,24.5,-66.5,49.5
    Program Code 020:072
    Related Documents https://www.epa.gov/node/276204, https://edg.epa.gov/metadata/catalog/search/resource/details.page?uuid=70CB7CB9-A915-48F6-A3DE-BE62446A454E
    Source Datajson Identifier True
    Source Hash a1958d6653fe2fc6a1c71bb84e3d0650b1a096e9a5fe9049abc92fcb833ae9b2
    Source Schema Version 1.1
    Spatial {"type": "Polygon", "coordinates": -125.0, 24.5, -125.0, 49.5, -66.5, 49.5, -66.5, 24.5, -125.0, 24.5}
    Temporal 2015/2030

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