{"accessLevel": "public", "bureauCode": ["010:12"], "contactPoint": {"@type": "vcard:Contact", "fn": "Kristine L Verdin", "hasEmail": "mailto:kverdin@usgs.gov"}, "description": "The Hydrologic Derivatives for Modeling and Analysis (HDMA) database provides comprehensive and consistent global coverage of raster and vector topographically derived layers. The HDMA includes five raster layers: digital elevation model (DEM) data, flow direction, flow accumulation, slope, and compound topographic index (CTI); and three vector layers: streams, catchment boundaries, and processing units. The coverage of the data is global (-180\u00ba, 180\u00ba, -90\u00ba, 90\u00ba) with the underlying DEM being a hybrid of three datasets: HydroSHEDS (Hydrological data and maps based on SHuttle Elevation Derivatives at multiple Scales), Global Multi-resolution Terrain Elevation Data 2010 (GMTED2010) and the Shuttle Radar Topography Mission (SRTM). For most of the globe south of 60\u00ba North, the raster resolution of the data is 3-arc-seconds, corresponding to the resolution of the SRTM. For the areas North of 60\u00ba, the resolution is 7.5-arc-seconds (the smallest resolution of the GMTED2010 dataset) except for Greenland, where the resolution is 30-arc-seconds. The streams and catchments are attributed with Pfafstetter codes, based on a hierarchical numbering system, that carry important topological information.", "distribution": [{"@type": "dcat:Distribution", "accessURL": "https://doi.org/10.5066/F7S180ZP", "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.5910def6e4b0e541a03ac98c.xml", "format": "XML", "mediaType": "text/xml", "title": "Original Metadata"}], "identifier": "http://datainventory.doi.gov/id/dataset/USGS_5910def6e4b0e541a03ac98c", "keyword": ["Africa", "Asia", "Asia Minor and Middle East", "Australia", "Australia and New Zealand", "Europe", "Greenland", "North America", "Pacific Islands", "Pfafstetter", "South America", "USGS:5910def6e4b0e541a03ac98c", "dem stream hydrologic derivatives pfafstetter", "digital elevation models", "elevation", "inlandWaters", "streams"], "modified": "2020-08-14T00:00:00Z", "publisher": {"@type": "org:Organization", "name": "U.S. Geological Survey"}, "spatial": "-180., -60., 180., 90.", "theme": ["geospatial"], "title": "Hydrologic Derivatives for Modeling and Applications (HDMA) database"}