{
  "accessLevel": "public",
  "bureauCode": [
    "010:12"
  ],
  "contactPoint": {
    "@type": "vcard:Contact",
    "fn": "Michael D.M. Pace",
    "hasEmail": "mailto:mpace@usgs.gov"
  },
  "description": "Shallow soil characteristics were mapped near Shellmound, Mississippi, using the DualEM 421 electromagnetic sensor in October 2018. Data were acquired by towing the DualEM sensor on a wheeled cart behind an all-terrain vehicle (ATV), with the sensor at a height of 0.432 meters (m) above the ground surface. Approximately 175 line-kilometers of data were acquired over an area of nearly four square-kilometers, with 25 m separation between survey lines. Data were manually edited for noise sources such as powerlines or other buried structures and averaged to regular output soundings every 5 m along survey lines. The processed data were inverted to recover models of electrical resistivity structure as a function of depth at each sounding location using a spatially constrained inversion. This data release contains the raw and processed data, as well as inverted resistivity models. Model results show typical depth of investigation from about 4 – 6 m, with spatial variability in mapped electrical resistivity characteristic of fluvial deposition of sediments in channels and scroll bar features adjacent to the Tallahatchie River and nearby abandoned meander channels.",
  "distribution": [
    {
      "@type": "dcat:Distribution",
      "accessURL": "https://doi.org/10.5066/P9YRT884",
      "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.5ada594fe4b0e2c2dd297b0a.xml",
      "format": "XML",
      "mediaType": "text/xml",
      "title": "Original Metadata"
    }
  ],
  "identifier": "http://datainventory.doi.gov/id/dataset/USGS_5ada594fe4b0e2c2dd297b0a",
  "keyword": [
    "GGGSC",
    "Geology, Geophysics, and Geochemistry Science Center",
    "Leflore County",
    "MRVA",
    "Mississippi",
    "Mississippi Alluvial Plain",
    "Mississippi River Valley Alluvial aquifer",
    "Shellmound",
    "Tallahatchie River",
    "USGS:5ada594fe4b0e2c2dd297b0a",
    "dualEM",
    "electromagnetic surveying",
    "electromagnetics",
    "engineering sciences",
    "environment",
    "geophysics",
    "geoscientificInformation",
    "geospatial datasets",
    "groundwater",
    "hydrogeology",
    "resistivity",
    "water resources"
  ],
  "modified": "2020-08-20T00:00:00Z",
  "publisher": {
    "@type": "org:Organization",
    "name": "U.S. Geological Survey"
  },
  "spatial": "-90.31430, 33.57960, -90.26980, 33.61270",
  "theme": [
    "geospatial"
  ],
  "title": "Ground-based electromagnetic survey, Shellmound, Mississippi, October 2018"
}