{"accessLevel": "public", "bureauCode": ["010:12"], "contactPoint": {"@type": "vcard:Contact", "fn": "Alaska Division of Geological & Geophysical Surveys", "hasEmail": "mailto:dggspubs@alaska.gov"}, "description": "Tofty airborne magnetic and radiometric survey, Alaska, Geophysical Report 2025-4, covers an area within the Tanana Quadrangle west of Fairbanks, Alaska. Magnetic and radiometric data were collected with a helicopter between August 25, 2024, and August 30, 2024, by EON Geosciences Inc. The survey contains a single block covering 298 km2. A total of 2,231.3 line-kilometers were collected. The magnetometer was installed inside the stinger attached to the helicopter nose. The airborne gamma-ray spectrometer was mounted on the interior floor of the helicopter cabin. The block was flown with a line spacing of 200 m, except for the northeastern portion of the block that was flown with a 100 m spacing. The nominal height of the survey was 134 m. Tie-lines for magnetic leveling were flown at 1,200 m spacing. The data, as well as additional metadata, are available from the DGGS website: https://doi.org/10.14509/31494", "distribution": [{"@type": "dcat:Distribution", "accessURL": "https://doi.org/10.14509/31494", "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.681b78bdd4be0225d797167f.xml", "format": "XML", "mediaType": "text/xml", "title": "Original Metadata"}], "identifier": "http://datainventory.doi.gov/id/dataset/USGS_681b78bdd4be0225d797167f", "keyword": ["Aeromagnetic", "Aeromagnetic Data", "Aeromagnetic Map", "Aeromagnetic Survey", "Airborne Geophysical Survey", "American Creek", "Analytic Signal", "Baker Creek", "Blowback Creek", "Cache Creek", "Camp Creek", "Colorado Creek", "Cooney Creek", "DGGS", "Deep Creek", "Deep Creek Lakes", "Dome Creek", "Eldorado Creek", "Exploration", "Fish Lake", "Geologic", "Geology", "Geophysical Map", "Geophysical Survey", "Geophysics", "Geophysics Search Tag", "Gold Basin Creek", "Gridded Data", "Killarney Creek", "Line Data", "Magnetic Data", "Magnetic Survey", "Magnetics", "New York Creek", "Quartz Creek", "Radiometrics", "Ready Money Creek", "Remote Sensing", "Sullivan Creek", "Tamarack Creek", "Tofty", "Tonawanda Creek", "USGS:681b78bdd4be0225d797167f", "Utah Creek", "Woodchopper Creek", "geoscientificInformation"], "modified": "2025-03-10T00:00:00Z", "publisher": {"@type": "org:Organization", "name": "U.S. Geological Survey"}, "spatial": "-151.343379, 64.995591, -150.437335, 65.190823", "theme": ["geospatial"], "title": "Tofty Airborne Magnetic and Radiometric Survey, Alaska"}