{"accessLevel": "public", "bureauCode": ["010:12"], "contactPoint": {"@type": "vcard:Contact", "fn": "Chesapeake Conservancy", "hasEmail": "mailto:cic@chesapeakeconservancy.org"}, "description": "The Chesapeake Bay Hyper-Resolution Hydrography Database is intended to facilitate analysis of the landscape in the Chesapeake Bay watershed through identification of headwater and other low-order streams or drainage features (e.g. ditches) that, to date, may be absent from existing hydrography data products. A full description of the methodology and accuracy assessment is provided in the accompanying report titled: \"Hydrography Mapping Supporting Modeling and Targeted Conservation: Project Overview and Lessons Learned\". The data products were developed by the Chesapeake Conservancy and the University of Maryland Baltimore County (UMBC) as part of a 6-year Cooperative Agreement between the Chesapeake Conservancy and the U.S. Environmental Protection Agency (EPA) and a separate Interagency Agreement between the USGS and the EPA to provide geospatial support to the Chesapeake Bay Program Office.\nThe data release is structured by eight-digit level hydrologic unit codes (HUC8) for the Chesapeake Bay watershed. Each HUC8 contains seven files (see below) and uses the following nomenclature: where HUC_ID and WATERSHED_NAME are placeholders for HUC8 ID(s), and local watershed name(s) (e.g., \"Hydrographic Datasets for Hydrologic Unit 02050101 - Upper Susquehanna\")\nData Release Structure:\nProject Overview and Lessons Learned.pdf (Project overivew, methodology and accuracy assessment)\nhuc_[HUC_ID]_streamLine.zip (Stream Lines)\nhuc_[HUC_ID]_streamPoly.zip (Stream Polygons)\nhuc_[HUC_ID]_agDitches.zip (Agricultural Ditches)\nhuc_[HUC_ID]_rdDitches.zip (Road Ditches)\nhuc_[HUC_ID]_geomorphon1m.tif (Geomorphon 1-meter)\nhuc_[HUC_ID]_geomorphon10m.tif (Geomorphon 10-meter)\nmetadata_[HUC_ID].xml (metadata xml)", "distribution": [{"@type": "dcat:Distribution", "accessURL": "https://doi.org/10.5066/P1GRAPEX", "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.679cfd2bd34e89501cd2d709.xml", "format": "XML", "mediaType": "text/xml", "title": "Original Metadata"}], "identifier": "http://datainventory.doi.gov/id/dataset/USGS_679cfd2bd34e89501cd2d709", "keyword": ["02070010", "Anacostia", "Chesapeake Bay Watershed", "District of Columbia", "Maryland", "USGS:679cfd2bd34e89501cd2d709", "Virginia", "hydrology", "imageryBaseMapsEarthCover", "land surface characteristics", "river reaches", "river systems"], "modified": "2025-05-23T00:00:00Z", "publisher": {"@type": "org:Organization", "name": "U.S. Geological Survey"}, "spatial": "-77.92487138540601, 38.40498205721859, -76.70388066597583, 39.29180685114222", "theme": ["geospatial"], "title": "Hydrographic Datasets for Hydrologic Unit 02070010 - Anacostia"}