{"accessLevel": "public", "bureauCode": ["010:12"], "contactPoint": {"@type": "vcard:Contact", "fn": "Bruce D. Smith", "hasEmail": "mailto:bsmith@usgs.gov"}, "description": "This report is a digital data release for a helicopter\nelectromagnetic and magnetic survey that was conducted during March\n2007 in three 93-square-kilometer (36-square-mile) areas of eastern\nNebraska as part of a joint State of Nebraska and U.S. Geological\nSurvey study.  The objective of the survey is to improve the\nunderstanding of the relationship between surface-water and ground-\nwater systems critical to developing water resource management\nprograms. The electromagnetic equipment consisted of six different\ncoil-pair orientations that measured electrical resistivity at\nseparate frequencies from about 400 hertz to about 115,000 hertz.\nThe electromagnetic data were converted to electrical resistivity\ngeo-referenced grids and maps, each representing different\napproximate depths of investigation for each area.  The range of\nsubsurface investigation is comparable to the depth of shallow\naquifers. The three areas selected for the study, Ashland, Firth, and\nOakland, have glacial terrains and bedrock that typify different\nhydrogeologic settings for surface water and ground water in eastern\nNebraska. The geophysical and hydrologic information from U.S.\nGeological Survey studies are being used by resource managers to\ndevelop ground-water resource plans for the area.", "distribution": [{"@type": "dcat:Distribution", "accessURL": "https://mrdata.usgs.gov/magnetic/show-survey.php?id=NE_4313", "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.216ace96-c629-446e-bc8a-ae9c2521cee0.xml", "format": "XML", "mediaType": "text/xml", "title": "Original Metadata"}], "identifier": "http://datainventory.doi.gov/id/dataset/USGS_216ace96-c629-446e-bc8a-ae9c2521cee0", "keyword": ["imageryBaseMapsEarthCover", "USGS:216ace96-c629-446e-bc8a-ae9c2521cee0", "environment", "Ashland", "f31153 = Sarpy", "geoscientificInformation", "geophysics", "Nebraska", "geospatial datasets", "f31155 = Saunders"], "modified": "2020-11-10T00:00:00Z", "publisher": {"@type": "org:Organization", "name": "U.S. Geological Survey"}, "spatial": "-96.41375, 41.04675, -96.23425, 41.16375", "theme": ["geospatial"], "title": "Airborne geophysical survey: Ashland HEM data"}