@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/1d40d05d-b8dd-4802-ad2f-0edaed8bbbfd> a dcat:Dataset ;
    dct:description "Aeromagnetic data were collected along flight lines by instruments in an aircraft that recorded magnetic-field values and locations. In the earlier days of surveying, the only way to represent this data was to generate an analog map with contour lines. This dataset is a representation of the digitized contour lines either by following the lines or by choosing the intersection of the contour and flight-line to create a value of the magnetic field. The values presented are latitude, longitude, and map magnetic-field values." ;
    dct:identifier "USGS:c9597851-24f3-439d-9188-a4eb69f2676d" ;
    dct:issued "2025-11-20T08:08:31.723281"^^xsd:dateTime ;
    dct:modified "20201110"^^xsd:gYear ;
    dct:publisher <https://data.amerigeoss.org/organization/727dbdd5-3f98-4ac0-9d28-5e344558139b> ;
    dct:spatial [ a dct:Location ;
            locn:geometry "POLYGON ((-75.9085 39.5825, -75.9085 39.9867, -75.3771 39.9867, -75.3771 39.5825, -75.9085 39.5825))"^^gsp:wktLiteral ] ;
    dct:title "Airborne geophysical survey: Delaware Fall Zone" ;
    dcat:contactPoint [ a vcard:Organization ;
            vcard:fn "Peter N. Schweitzer" ;
            vcard:hasEmail <mailto:pschweitzer@usgs.gov> ] ;
    dcat:distribution <https://data.amerigeoss.org/dataset/1d40d05d-b8dd-4802-ad2f-0edaed8bbbfd/resource/e2374861-7ae8-45a1-a9ce-054ed6fac239> ;
    dcat:keyword "aeromagnetic-surveying",
        "amerigeo",
        "amerigeoss",
        "ckan",
        "f10003-new-castle",
        "f24015-cecil",
        "f34015-gloucester",
        "f34033-salem",
        "f42029-chester",
        "f42045-delaware",
        "field-monitoring-stations",
        "geo",
        "geophysics",
        "geospatial-datasets",
        "geoss",
        "magnetic-field-earth",
        "national",
        "north-america",
        "united-states",
        "usgs-c9597851-24f3-439d-9188-a4eb69f2676d" ;
    dcat:theme <%7Bgeospatial%7D> .

<https://data.amerigeoss.org/dataset/1d40d05d-b8dd-4802-ad2f-0edaed8bbbfd/resource/e2374861-7ae8-45a1-a9ce-054ed6fac239> a dcat:Distribution ;
    dct:description "The metadata original format" ;
    dct:format "XML" ;
    dct:issued "2022-08-05T20:19:51.912248"^^xsd:dateTime ;
    dct:modified "2025-11-20T08:08:31.712304"^^xsd:dateTime ;
    dct:title "Original Metadata" ;
    dcat:accessURL <https://data.usgs.gov/datacatalog/metadata/USGS.c9597851-24f3-439d-9188-a4eb69f2676d.xml> ;
    dcat:mediaType "text/xml" .

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