{"accessLevel": "public", "bureauCode": ["010:12"], "contactPoint": {"@type": "vcard:Contact", "fn": "Karen R. Ryberg", "hasEmail": "mailto:kryberg@usgs.gov"}, "description": "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.", "distribution": [{"@type": "dcat:Distribution", "accessURL": "http://dx.doi.org/10.5066/F7NG4NQ4", "description": "Landing page for access to the data", "format": "XML", "mediaType": "application/http", "title": "Digital Data"}, {"@type": "dcat:Distribution", "description": "The metadata original format", "downloadURL": "https://data.usgs.gov/datacatalog/metadata/USGS.577d689ee4b0ef4d2f43b473.xml", "format": "XML", "mediaType": "text/xml", "title": "Original Metadata"}], "identifier": "http://datainventory.doi.gov/id/dataset/USGS_577d689ee4b0ef4d2f43b473", "keyword": ["USGS:577d689ee4b0ef4d2f43b473", "Potomac River", "Pennsylvania", "West Virginia", "Maryland", "surface water quality", "Rappahannock River", "James River", "Susquehanna River", "Virginia", "impervious surfaces", "Delaware", "New York", "District of Columbia", "Chesapeake Bay"], "modified": "2020-08-18T00:00:00Z", "publisher": {"@type": "org:Organization", "name": "U.S. Geological Survey"}, "spatial": "-80.55161394556775, 36.62479659512296, -74.2272808505554, 43.55759203025379", "theme": ["geospatial"], "title": "Percent impervious surface for selected Chesapeake Bay watersheds"}