@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/68dfcd1b-d8eb-42ed-a597-225539fe5a5e> a dcat:Dataset ;
    dct:description "Electrical resistivity tomography (ERT) surveys were done northwest of the Air Force Research Laboratory (AFRL) at Edwards Air Force Base. ERT surveys were done at four locations in May through June of 2018 to refine the understanding of the bedrock-alluvial aquifer transition zone downgradient from the AFRL. The ERT technique injects direct-current electricity with known voltage and current into the earth using a series of electrodes and measures the resulting resistivity. This technique is generally limited to investigations of aquifer properties less than 100 meters below land surface. Data from other geophysical techniques co-located with the ERT data, including time-domain electromagnetics and horizontal-to-vertical spectral ratio passive seismic, are made available in other child pages within this data release: https://doi.org/10.5066/P9ZGZTA4. This page contains the ERT data, spatial information for the ERT transects, and preliminary processed ERT data." ;
    dct:identifier "USGS:5c7daa45e4b0fe48cb532dd0" ;
    dct:issued "2025-11-22T09:49:55.293910"^^xsd:dateTime ;
    dct:modified "20200819"^^xsd:gYear ;
    dct:publisher <https://data.amerigeoss.org/organization/727dbdd5-3f98-4ac0-9d28-5e344558139b> ;
    dct:spatial [ a dct:Location ;
            locn:geometry "POLYGON ((-117.7398 34.9505, -117.7398 34.9761, -117.6584 34.9761, -117.6584 34.9505, -117.7398 34.9505))"^^gsp:wktLiteral ] ;
    dct:title "Electrical Resistivity Tomography Data at Edwards Air Force Research Laboratory, Antelope Valley, California, 2018" ;
    dcat:contactPoint [ a vcard:Organization ;
            vcard:fn "Krishangi Groover" ;
            vcard:hasEmail <mailto:kgroover@usgs.gov> ] ;
    dcat:distribution <https://data.amerigeoss.org/dataset/68dfcd1b-d8eb-42ed-a597-225539fe5a5e/resource/221323cf-86e6-439c-8a62-ed5cd36bee05>,
        <https://data.amerigeoss.org/dataset/68dfcd1b-d8eb-42ed-a597-225539fe5a5e/resource/9b9119e5-1db3-48d1-b4f6-7a0624085e96> ;
    dcat:keyword "amerigeo",
        "amerigeoss",
        "antelope-fremont-valleys",
        "bedrock-geologic-units",
        "boron",
        "california",
        "california-water-science-center",
        "ckan",
        "edwards-air-force-base",
        "electrical-resistivity-tomography",
        "environment",
        "geo",
        "geophysics",
        "geoscientificinformation",
        "geoss",
        "groundwater",
        "hydrologic-processes",
        "leuhman-ridge",
        "mojave-desert",
        "national",
        "north-america",
        "north-edwards",
        "united-states",
        "usgs-5c7daa45e4b0fe48cb532dd0",
        "water-resources" ;
    dcat:theme <%7Bgeospatial%7D> .

<https://data.amerigeoss.org/dataset/68dfcd1b-d8eb-42ed-a597-225539fe5a5e/resource/221323cf-86e6-439c-8a62-ed5cd36bee05> a dcat:Distribution ;
    dct:description "The metadata original format" ;
    dct:format "XML" ;
    dct:issued "2022-08-07T00:51:08.924665"^^xsd:dateTime ;
    dct:modified "2025-11-22T09:49:55.280574"^^xsd:dateTime ;
    dct:title "Original Metadata" ;
    dcat:accessURL <https://data.usgs.gov/datacatalog/metadata/USGS.5c7daa45e4b0fe48cb532dd0.xml> ;
    dcat:mediaType "text/xml" .

<https://data.amerigeoss.org/dataset/68dfcd1b-d8eb-42ed-a597-225539fe5a5e/resource/9b9119e5-1db3-48d1-b4f6-7a0624085e96> a dcat:Distribution ;
    dct:description "Landing page for access to the data" ;
    dct:format "XML" ;
    dct:issued "2022-08-07T00:51:08.924671"^^xsd:dateTime ;
    dct:modified "2025-11-22T09:49:55.281086"^^xsd:dateTime ;
    dct:title "Digital Data" ;
    dcat:accessURL <https://doi.org/10.5066/P9ZGZTA4> ;
    dcat:mediaType "application/http" .

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