{"@type": "dcat:Dataset", "accessLevel": "public", "bureauCode": ["026:00"], "contactPoint": {"@type": "vcard:Contact", "fn": "Earthdata Forum", "hasEmail": "mailto:earthdata-support@nasa.gov"}, "description": "This product provides detailed information about the satellite-based data on artificial light at night (ALAN). The Suomi National Polar-orbiting Partnership (S-NPP) Visible Infrared Imaging Radiometer Suite (VIIRS) Day/Night Band (DNB) nighttime lights (NTL) product (VNP46A4, DOI: 10.5067/VIIRS/VNP46A4.001 ) in NASA\u2019s Black Marble suite is used to derive annual summary of ALAN levels throughout the CONUS at both county and tract level for the period of 2012-2020. The PI Dr. Qian Xiao is a member of NASA Heath and Air Quality Applied Sciences Team (HAQAST).", "distribution": [{"@type": "dcat:Distribution", "conformsTo": "http://www.isotc211.org/2005/gmi", "description": "The metadata's original source.", "downloadURL": "https://cmr.earthdata.nasa.gov/search/concepts/C2650219940-GES_DISC.iso19115", "format": "ISO", "mediaType": "text/xml", "title": "Original Metadata"}, {"@type": "dcat:Distribution", "downloadURL": "https://acdisc.gesdisc.eosdis.nasa.gov/data/HAQAST/ALAN_VIIRS_CONUS.1/", "format": "BIN", "mediaType": "application/octet-stream"}, {"@type": "dcat:Distribution", "downloadURL": "https://acdisc.gesdisc.eosdis.nasa.gov/data/HAQAST/ALAN_VIIRS_CONUS.1/doc/README_ALAN_VIIRS_CONUS.pdf", "format": "PDF", "mediaType": "application/pdf"}, {"@type": "dcat:Distribution", "downloadURL": "https://disc.gsfc.nasa.gov/datasets/ALAN_VIIRS_CONUS_1/summary", "format": "BIN", "mediaType": "application/octet-stream"}, {"@type": "dcat:Distribution", "downloadURL": "https://docserver.gesdisc.eosdis.nasa.gov/public/project/Images/ALAN_VIIRS_CONUS_1.png", "format": "PNG", "mediaType": "image/png"}, {"@type": "dcat:Distribution", "downloadURL": "https://haqast.org/", "format": "BIN", "mediaType": "application/octet-stream"}, {"@type": "dcat:Distribution", "downloadURL": "https://search.earthdata.nasa.gov/search/granules?p=C2650219940-GES_DISC", "format": "BIN", "mediaType": "application/octet-stream"}], "identifier": "10.5067/TZY5MHFMYLKQ", "keyword": ["earth-science-air-quality-atmosphere", "earth-science-natural-hazards-human-dimensions", "earth-science-visible-wavelengths-spectral-engineering"], "license": "https://www.usa.gov/government-works", "modified": "2026-06-23", "programCode": ["026:000"], "publisher": {"@type": "org:Organization", "name": "NASA/GSFC/SED/ESD/TISL/GESDISC"}, "spatial": "[\"CARTESIAN\", [{\"WestBoundingCoordinate\": -129.9979, \"NorthBoundingCoordinate\": 49.99792, \"EastBoundingCoordinate\": -60.00208, \"SouthBoundingCoordinate\": 20.00208}]]", "temporal": "2012-01-01/2020-12-31", "theme": ["Earth Science"], "title": "Annual Summary of Artificial Light At Night from VIIRS/S-NPP at CONUS County and Census Tract V1 (ALAN_VIIRS_CONUS) at GES DISC"}