{"accessLevel": "public", "bureauCode": ["010:12"], "contactPoint": {"@type": "vcard:Contact", "fn": "Peter N. Schweitzer", "hasEmail": "mailto:pschweitzer@usgs.gov"}, "description": "Aeromagnetic data were collected along flight lines by instruments in an aircraft that recorded magnetic-field values and locations. In the earlier days of surveying, the only way to represent this data was to generate an analog map with contour lines. This dataset is a representation of the digitized contour lines either by following the lines or by choosing the intersection of the contour and flight-line to create a value of the magnetic field. The values presented are latitude, longitude, and map magnetic-field values.", "distribution": [{"@type": "dcat:Distribution", "description": "The metadata original format", "downloadURL": "https://data.usgs.gov/datacatalog/metadata/USGS.c9597851-24f3-439d-9188-a4eb69f2676d.xml", "format": "XML", "mediaType": "text/xml", "title": "Original Metadata"}], "identifier": "http://datainventory.doi.gov/id/dataset/USGS_c9597851-24f3-439d-9188-a4eb69f2676d", "keyword": ["USGS:c9597851-24f3-439d-9188-a4eb69f2676d", "aeromagnetic surveying", "f10003 = New Castle", "f24015 = Cecil", "f34015 = Gloucester", "f34033 = Salem", "f42029 = Chester", "f42045 = Delaware", "field monitoring stations", "geophysics", "geospatial datasets", "magnetic field (earth)"], "modified": "2020-11-10T00:00:00Z", "publisher": {"@type": "org:Organization", "name": "U.S. Geological Survey"}, "spatial": "-75.908531188965, 39.582450866699, -75.377113342285, 39.986663818359", "theme": ["geospatial"], "title": "Airborne geophysical survey: Delaware Fall Zone"}