@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/77c7d015-5d2f-4b31-bc75-ebe959dac117> a dcat:Dataset ;
    dct:description """Single-beam bathymetry, gravity, and magnetic data along with DGPS navigation data was collected as part of field activity G-1-75-EG in Eastern Gulf of Alaska, Continental Shelf from 06/22/1975 to 08/27/1975, http://walrus.wr.usgs.gov/infobank/g/g175eg/html/g-1-75-eg.meta.html
The geophysical source was a Knudsen 12 kHz 320B/R echosounder.
These data are reformatted from space-delimited ASCII text files located in the Coastal and Marine Geology Program (CMGP) InfoBank field activity catalog at http://walrus.wr.usgs.gov/infobank/g/g175eg/html/g-1-75-eg.bath.html into MGD77T format provided by the NOAA's National Geophysical Data Center(NGDC). The MGD77T format includes a header (documentation) file (.h77t) and a data file (.m77t). More information regarding this format can be found in the publication listed in the Cross_reference section of this metadata file.""" ;
    dct:identifier "USGS:fcb6e449-f918-4fe9-8fd2-0db8bd6f47d8" ;
    dct:issued "2025-11-22T19:25:44.218427"^^xsd:dateTime ;
    dct:modified "20201019"^^xsd:gYear ;
    dct:publisher <https://data.amerigeoss.org/organization/727dbdd5-3f98-4ac0-9d28-5e344558139b> ;
    dct:spatial [ a dct:Location ;
            locn:geometry "POLYGON ((-162.7270 54.0310, -162.7270 60.1893, -137.0603 60.1893, -137.0603 54.0310, -162.7270 54.0310))"^^gsp:wktLiteral ] ;
    dct:title "g175eg.m77t - MGD77 data file for Geophysical data from field activity G-1-75-EG in Eastern Gulf of Alaska, Continental Shelf from 06/22/1975 to 08/27/1975" ;
    dcat:contactPoint [ a vcard:Organization ;
            vcard:fn "Gregory K. Miller" ;
            vcard:hasEmail <mailto:gmiller@usgs.gov> ] ;
    dcat:distribution <https://data.amerigeoss.org/dataset/77c7d015-5d2f-4b31-bc75-ebe959dac117/resource/614ffb83-13a6-4b2e-9ce1-68bfc48d5f0d>,
        <https://data.amerigeoss.org/dataset/77c7d015-5d2f-4b31-bc75-ebe959dac117/resource/e4f2f7ff-15fb-4c4c-b9f3-a607221594dc> ;
    dcat:keyword "ak",
        "alaska",
        "amerigeo",
        "amerigeoss",
        "bathymetry",
        "bathymetry-and-elevation",
        "bathymetry-measurement",
        "ckan",
        "distributions",
        "eastern-gulf-of-alaska",
        "eastern-gulf-of-alaska-continental-shelf",
        "geo",
        "geoscientificinformation",
        "geoss",
        "gravimeter-measurement",
        "gravimetry",
        "magnetic-anomalies",
        "magnetic-field-observations",
        "magnetometer-measurement",
        "marine-geology",
        "marine-geophysics",
        "marine-gravity-field",
        "marine-magnetic-field",
        "national",
        "north-america",
        "oceans",
        "seafloor-topography",
        "single-beam-echo-sounder",
        "united-states",
        "usa",
        "usgs-fcb6e449-f918-4fe9-8fd2-0db8bd6f47d8",
        "water-depth" ;
    dcat:theme <%7Bgeospatial%7D> .

<https://data.amerigeoss.org/dataset/77c7d015-5d2f-4b31-bc75-ebe959dac117/resource/614ffb83-13a6-4b2e-9ce1-68bfc48d5f0d> a dcat:Distribution ;
    dct:description "The metadata original format" ;
    dct:format "XML" ;
    dct:issued "2022-07-28T20:13:02.572174"^^xsd:dateTime ;
    dct:modified "2025-11-22T19:25:44.201857"^^xsd:dateTime ;
    dct:title "Original Metadata" ;
    dcat:accessURL <https://data.usgs.gov/datacatalog/metadata/USGS.fcb6e449-f918-4fe9-8fd2-0db8bd6f47d8.xml> ;
    dcat:mediaType "text/xml" .

<https://data.amerigeoss.org/dataset/77c7d015-5d2f-4b31-bc75-ebe959dac117/resource/e4f2f7ff-15fb-4c4c-b9f3-a607221594dc> a dcat:Distribution ;
    dct:description "Landing page for access to the data" ;
    dct:format "XML" ;
    dct:issued "2022-07-28T20:13:02.572181"^^xsd:dateTime ;
    dct:modified "2025-11-22T19:25:44.202270"^^xsd:dateTime ;
    dct:title "Digital Data" ;
    dcat:accessURL <http://www.ngdc.noaa.gov/mgg/trk/trackline/cecil_h._green/g175eg/mgd77/> ;
    dcat:mediaType "application/http" .

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