@prefix dcat: <http://www.w3.org/ns/dcat#> .
@prefix dct: <http://purl.org/dc/terms/> .
@prefix foaf: <http://xmlns.com/foaf/0.1/> .
@prefix gsp: <http://www.opengis.net/ont/geosparql#> .
@prefix locn: <http://www.w3.org/ns/locn#> .
@prefix vcard: <http://www.w3.org/2006/vcard/ns#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .

<https://data.amerigeoss.org/dataset/4000af36-a0df-4cf5-a70b-5a4ff531b34a> a dcat:Dataset ;
    dct: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." ;
    dct:identifier "USGS:5ada594fe4b0e2c2dd297b0a" ;
    dct:issued "2025-11-21T05:17:35.579571"^^xsd:dateTime ;
    dct:modified "20200820"^^xsd:gYear ;
    dct:publisher <https://data.amerigeoss.org/organization/727dbdd5-3f98-4ac0-9d28-5e344558139b> ;
    dct:spatial [ a dct:Location ;
            locn:geometry "POLYGON ((-90.3143 33.5796, -90.3143 33.6127, -90.2698 33.6127, -90.2698 33.5796, -90.3143 33.5796))"^^gsp:wktLiteral ] ;
    dct:title "Ground-based electromagnetic survey, Shellmound, Mississippi, October 2018" ;
    dcat:contactPoint [ a vcard:Organization ;
            vcard:fn "Michael D.M. Pace" ;
            vcard:hasEmail <mailto:mpace@usgs.gov> ] ;
    dcat:distribution <https://data.amerigeoss.org/dataset/4000af36-a0df-4cf5-a70b-5a4ff531b34a/resource/3bef451d-d6ab-4358-a769-fa5c8aad405c>,
        <https://data.amerigeoss.org/dataset/4000af36-a0df-4cf5-a70b-5a4ff531b34a/resource/55011e9c-7eec-4491-9faf-93036b1c2fe5> ;
    dcat:keyword "amerigeo",
        "amerigeoss",
        "ckan",
        "dualem",
        "electromagnetic-surveying",
        "electromagnetics",
        "engineering-sciences",
        "environment",
        "geo",
        "geology-geophysics-and-geochemistry-science-center",
        "geophysics",
        "geoscientificinformation",
        "geospatial-datasets",
        "geoss",
        "gggsc",
        "groundwater",
        "hydrogeology",
        "leflore-county",
        "mississippi",
        "mississippi-alluvial-plain",
        "mississippi-river-valley-alluvial-aquifer",
        "mrva",
        "national",
        "north-america",
        "resistivity",
        "shellmound",
        "tallahatchie-river",
        "united-states",
        "usgs-5ada594fe4b0e2c2dd297b0a",
        "water-resources" ;
    dcat:theme <%7Bgeospatial%7D> .

<https://data.amerigeoss.org/dataset/4000af36-a0df-4cf5-a70b-5a4ff531b34a/resource/3bef451d-d6ab-4358-a769-fa5c8aad405c> a dcat:Distribution ;
    dct:description "Landing page for access to the data" ;
    dct:format "XML" ;
    dct:issued "2022-08-07T02:51:15.499793"^^xsd:dateTime ;
    dct:modified "2025-11-21T05:17:35.564700"^^xsd:dateTime ;
    dct:title "Digital Data" ;
    dcat:accessURL <https://doi.org/10.5066/P9YRT884> ;
    dcat:mediaType "application/http" .

<https://data.amerigeoss.org/dataset/4000af36-a0df-4cf5-a70b-5a4ff531b34a/resource/55011e9c-7eec-4491-9faf-93036b1c2fe5> a dcat:Distribution ;
    dct:description "The metadata original format" ;
    dct:format "XML" ;
    dct:issued "2022-08-07T02:51:15.499786"^^xsd:dateTime ;
    dct:modified "2025-11-21T05:17:35.564276"^^xsd:dateTime ;
    dct:title "Original Metadata" ;
    dcat:accessURL <https://data.usgs.gov/datacatalog/metadata/USGS.5ada594fe4b0e2c2dd297b0a.xml> ;
    dcat:mediaType "text/xml" .

<https://data.amerigeoss.org/organization/727dbdd5-3f98-4ac0-9d28-5e344558139b> a foaf:Agent ;
    foaf:name "US Migrating" .