@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/24e26ec1-2237-430f-9d81-ea99eb16031d> a dcat:Dataset ;
    dct:description "Topographic data were collected by the U.S. Geological Survey (USGS) in 2015 for Little Holland Tract in the Sacramento-San Joaquin River Delta, California. The data were collected on foot using a global positioning system (GPS) backpack platform that consisted of survey-grade Trimble R10 and R7 global navigation satellite system (GNSS) receivers with Zephyr 2 antennas. Orthometric elevations relative to NAVD88 were computed using the National Geodetic Survey Geoid12a, and the final data were projected in Cartesian coordinates using the UTM Zone 10 North (meters) (NAD83[2011]) coordinate system. The mean estimated vertical uncertainty of the 2015 USGS GPS backpack survey is 3.5 cm. " ;
    dct:identifier "USGS:56671ef1e4b06a3ea36c8bf5" ;
    dct:issued "2025-11-20T12:30:12.949099"^^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 ((-121.6663 38.3107, -121.6663 38.3501, -121.6488 38.3501, -121.6488 38.3107, -121.6663 38.3107))"^^gsp:wktLiteral ] ;
    dct:title "Topographic measurements of Little Holland Tract, Sacramento-San Joaquin Delta, California, 2015, using backpack GPS" ;
    dcat:contactPoint [ a vcard:Organization ;
            vcard:fn "PCMSC Science Data Coordinator" ;
            vcard:hasEmail <mailto:pcmsc_data@usgs.gov> ] ;
    dcat:distribution <https://data.amerigeoss.org/dataset/24e26ec1-2237-430f-9d81-ea99eb16031d/resource/6556d402-9763-4933-b5d9-99e6e59ead2f>,
        <https://data.amerigeoss.org/dataset/24e26ec1-2237-430f-9d81-ea99eb16031d/resource/ec60ab80-457e-44ad-9f78-daa9ae2a3063> ;
    dcat:keyword "amerigeo",
        "amerigeoss",
        "bathymetry-and-elevation",
        "ckan",
        "elevation",
        "geo",
        "geoss",
        "global-positioning-system-gps-observations",
        "gps-global-positioning-system",
        "gps-measurement",
        "liberty-island",
        "little-holland-tract",
        "national",
        "north-america",
        "sacramento-river-deep-water-ship-channel",
        "sacramento-san-joaquin-delta",
        "solano-county",
        "united-states",
        "usgs-56671ef1e4b06a3ea36c8bf5",
        "yolo-county" ;
    dcat:theme <%7Bgeospatial%7D> .

<https://data.amerigeoss.org/dataset/24e26ec1-2237-430f-9d81-ea99eb16031d/resource/6556d402-9763-4933-b5d9-99e6e59ead2f> a dcat:Distribution ;
    dct:description "Landing page for access to the data" ;
    dct:format "XML" ;
    dct:issued "2022-08-07T09:18:07.954825"^^xsd:dateTime ;
    dct:modified "2025-11-20T12:30:12.938072"^^xsd:dateTime ;
    dct:title "Digital Data" ;
    dcat:accessURL <https://doi.org/10.5066/F7RX9954> ;
    dcat:mediaType "application/http" .

<https://data.amerigeoss.org/dataset/24e26ec1-2237-430f-9d81-ea99eb16031d/resource/ec60ab80-457e-44ad-9f78-daa9ae2a3063> a dcat:Distribution ;
    dct:description "The metadata original format" ;
    dct:format "XML" ;
    dct:issued "2022-08-07T09:18:07.954819"^^xsd:dateTime ;
    dct:modified "2025-11-20T12:30:12.937659"^^xsd:dateTime ;
    dct:title "Original Metadata" ;
    dcat:accessURL <https://data.usgs.gov/datacatalog/metadata/USGS.56671ef1e4b06a3ea36c8bf5.xml> ;
    dcat:mediaType "text/xml" .

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