The LakeCat Dataset: Accumulated Attributes for NHDPlusV2 (Version 2.1) Catchments for the Conterminous United States: National Land Cover Database - Impervious Surfaces

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  {
    "@type": "dcat:Distribution",
    "title": "LakeCat Dataset",
    "format": "API",
    "accessURL": "https://www.epa.gov/national-aquatic-resource-surveys/lakecat-dataset",
    "describedBy": "https://www.epa.gov/national-aquatic-resource-surveys/lakecat-metrics-and-definitions",
    "description": "LakeCat currently contains over 300 metrics that include local catchment (Cat), watershed (Ws), and special metrics. See Geospatial Framework and Terms in the ReadMe for definitions of the terms ‘catchment’ and ‘watershed’ as used with the LakeCat Dataset. An additional metric, inStreamCat, indicates whether the variable was pulled from the StreamCat Dataset or calculated with a geospatial framework that was developed for LakeCat.

These metrics are available for 378,088 lakes and their associated catchments across the conterminous US. LakeCat metrics represent both natural (e.g., soils and geology) and anthropogenic (e.g, urban areas and agriculture) landscape information.",
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  {
    "@type": "dcat:Distribution",
    "title": "National Land Cover Database - Impervious Surfaces",
    "format": "Comma-Separated Values (.csv)",
    "mediaType": "text/csv",
    "describedBy": "https://www.epa.gov/national-aquatic-resource-surveys/lakecat-metrics-and-definitions",
    "description": "This dataset represents the impervious surface coefficients within individual local and accumulated upstream catchments for NHDPlusV2 Waterbodies based on the National Land Cover Data. AOI 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-AOI boundaries and then links them through an off-network flow table. This data set is derived from the NLCD Impervious Surfaces raster which describes percent imperviousness (continuous data type). Values indicate the degree to which the area is composed of impervious anthropogenic materials (e.g., parking surfaces, roads, building roofs). This raster was produced based on a decision-tree classification of 2001, 2004, 2006, 2008, 2011, 2013, 2016, and 2019 Landsat satellite data. This dataset will include additional years as they become available. ",
    "downloadURL": "https://www.epa.gov/node/276204",
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