@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/4c5d4415-5db0-4dc0-b6e2-509219e519a4> a dcat:Dataset ;
    dct:description "In summer 2018, the U.S. Geological Survey partnered with the U.S Department of Energy and the Bureau of Ocean Energy Management to conduct the Mid-Atlantic Resources Imaging Experiment (MATRIX) as part of the U.S. Geological Survey Gas Hydrates Project. The field program objectives were to acquire high-resolution 2-dimensional multichannel seismic-reflection and split-beam echosounder data along the U.S Atlantic margin between North Carolina and New Jersey to determine the distribution of methane gas hydrates in below-sea floor sediments and investigate potential connections between gas hydrate dynamics and sea floor methane seepage. MATRIX field work was carried out between August 8 and August 28, 2018 on the research vessel Hugh R. Sharp and resulted in acquisition of more than 2,000 track-line kilometers of multichannel seismic-reflection and colocated split-beam echosounder data, along with wide-angle seismic reflection and refraction data from 63 expendable sonobuoy deployments." ;
    dct:identifier "USGS:5f0e234e82ce21d4c4053f45" ;
    dct:issued "2025-11-21T13:16:32.351263"^^xsd:dateTime ;
    dct:modified "20210127"^^xsd:gYear ;
    dct:publisher <https://data.amerigeoss.org/organization/727dbdd5-3f98-4ac0-9d28-5e344558139b> ;
    dct:spatial [ a dct:Location ;
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    dct:title "Multichannel Seismic-Reflection and Navigation Data Collected Using Sercel GI Guns and Geometrics GeoEel Digital Streamers During the Mid-Atlantic Resource Imaging Experiment (MATRIX), USGS Field Activity 2018-002-FA" ;
    dcat:contactPoint [ a vcard:Organization ;
            vcard:fn "Wayne E. Baldwin" ;
            vcard:hasEmail <mailto:wbaldwin@usgs.gov> ] ;
    dcat:distribution <https://data.amerigeoss.org/dataset/4c5d4415-5db0-4dc0-b6e2-509219e519a4/resource/918124c1-1750-41ff-ad23-a256bce96682>,
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        "ckan",
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        "department-of-energy",
        "department-of-the-interior",
        "doe",
        "doi",
        "field-activity-number-2018-002-fa",
        "generator-injector-airgun",
        "geo",
        "geoeel",
        "geometrics",
        "geoscientificinformation",
        "geoss",
        "hrs1807",
        "image",
        "location",
        "marine-geology",
        "marine-geophysics",
        "maryland",
        "matrix",
        "mid-atlantic-margin",
        "mid-atlantic-resources-imaging-experiment",
        "multi-channel-streamer",
        "national",
        "navigation",
        "new-jersey",
        "north-america",
        "north-carolina",
        "oceans",
        "png",
        "r-v-hugh-r-sharp",
        "sea-floor",
        "seafloor",
        "seg-y",
        "seismic-profile",
        "seismic-reflection",
        "seismic-reflection-methods",
        "sercel",
        "shapefile",
        "u-s-economic-exclusive-zone",
        "u-s-geological-survey",
        "united-states",
        "united-states-of-america",
        "usgs",
        "usgs-5f0e234e82ce21d4c4053f45",
        "virginia",
        "whcmsc",
        "woods-hole-coastal-and-marine-science-center" ;
    dcat:theme <%7Bgeospatial%7D> .

<https://data.amerigeoss.org/dataset/4c5d4415-5db0-4dc0-b6e2-509219e519a4/resource/918124c1-1750-41ff-ad23-a256bce96682> a dcat:Distribution ;
    dct:description "The metadata original format" ;
    dct:format "XML" ;
    dct:issued "2022-08-06T21:37:18.886077"^^xsd:dateTime ;
    dct:modified "2025-11-21T13:16:32.324640"^^xsd:dateTime ;
    dct:title "Original Metadata" ;
    dcat:accessURL <https://data.usgs.gov/datacatalog/metadata/USGS.5f0e234e82ce21d4c4053f45.xml> ;
    dcat:mediaType "text/xml" .

<https://data.amerigeoss.org/dataset/4c5d4415-5db0-4dc0-b6e2-509219e519a4/resource/9be1767d-cace-48b1-9941-f55e8ade913c> a dcat:Distribution ;
    dct:description "Landing page for access to the data" ;
    dct:format "XML" ;
    dct:issued "2022-08-06T21:37:18.886083"^^xsd:dateTime ;
    dct:modified "2025-11-21T13:16:32.325041"^^xsd:dateTime ;
    dct:title "Digital Data" ;
    dcat:accessURL <https://doi.org/10.5066/P91WP1RZ> ;
    dcat:mediaType "application/http" .

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