{"accessLevel": "public", "bureauCode": ["010:12"], "contactPoint": {"@type": "vcard:Contact", "fn": "Victoria E Langenheim", "hasEmail": "mailto:zulanger@usgs.gov"}, "description": "This data release contains (1) principal facts of gravity measurements by previous studies and collected by the U.S. Geological Survey in 2006-2024, (2) geophysical grids, and (3) horizontal gradient maxima derived from gravity and magnetic potential fields of the Healdsburg 30 by 60 minute quadrangle, California.  Gridded data are provided in geotiff format.  These data support modeling of gravity and magnetic anomalies to understand the structure beneath this region.", "distribution": [{"@type": "dcat:Distribution", "accessURL": "https://doi.org/10.5066/P18OBRK2", "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.686d87b6d4be026f4a0163d7.xml", "format": "XML", "mediaType": "text/xml", "title": "Original Metadata"}], "identifier": "http://datainventory.doi.gov/id/dataset/USGS_686d87b6d4be026f4a0163d7", "keyword": ["Alexander Valley (California)", "Calistoga, CA", "Capay Valley (California)", "Clear Lake (California)", "Healdsburg, CA", "Kelseyville, CA", "Lake Berryessa (California)", "Mount St. Helena", "Rumsey, CA", "USGS:686d87b6d4be026f4a0163d7", "geoscientificInformation", "gravity grid", "gravity maximum horizontal gradient", "gravity measurement", "magnetic maximum horizontal gradient", "reduced to pole aeromagnetic grid"], "modified": "2025-09-23T00:00:00Z", "publisher": {"@type": "org:Organization", "name": "U.S. Geological Survey"}, "spatial": "-123.0000, 38.5000, -122.0000, 39.0000", "theme": ["geospatial"], "title": "Gravity data, geophysical grids, and horizontal gradient maxima of the Healdsburg 30 by 60 minute quadrangle, California"}