@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 xsd: <http://www.w3.org/2001/XMLSchema#> .

<https://data.amerigeoss.org/dataset/14a4d1aa-2b7e-44c5-b0e2-96a656b04bd9> a dcat:Dataset ;
    dct:description "The Tonsina electromagnetic and magnetic airborne geophysical survey data were acquired with a DIGHEMv Electromagnetic (EM) system and a CGG D1344 cesium magnetometer with a Scintrex CS3 cesium sensor. The EM and magnetic sensors were flown at a height of 30 meters (m). In addition the survey recorded data from radar and laser altimeters, GPS navigation system, 50/60 Hz monitors and video camera. Flights were performed with an AS-350-B3 Squirrel helicopter at a mean terrain clearance of 60 m along NW-SE (345 degrees) survey flight lines with a spacing of 400 m. Tie lines were flown perpendicular to the flight lines at intervals of approximately 4,800 m. These data were produced under contract between the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys (DGGS), and CGG Land (U.S.) Inc. Airborne geophysical data for the area were acquired and processed by CGG in 2014 and 2015. The project was funded by the Alaska State Legislature as part of the Alaska Airborne Geophysical and Geological Mineral Inventory Program and the Alaska Strategic and Critical Minerals Assessment Capital Improvement Project." ;
    dct:identifier "ffbc1e7c-1f1b-4d21-be44-4d1625ffa34a_source" ;
    dct:issued "2025-09-23T23:46:57.586850"^^xsd:dateTime ;
    dct:modified "2025-09-23T23:46:57.586858"^^xsd:dateTime ;
    dct:publisher <https://data.amerigeoss.org/organization/727dbdd5-3f98-4ac0-9d28-5e344558139b> ;
    dct:spatial [ a dct:Location ;
            locn:geometry "POLYGON ((-145.4468 61.4790, -144.7425 61.4790, -144.7425 61.7144, -145.4468 61.7144, -145.4468 61.4790))"^^gsp:wktLiteral ] ;
    dct:title "Tonsina electromagnetic and magnetic airborne geophysical survey data compilation" ;
    dcat:distribution <https://data.amerigeoss.org/dataset/14a4d1aa-2b7e-44c5-b0e2-96a656b04bd9/resource/034b46f0-6d07-411b-88a8-6f03d6d95ed9>,
        <https://data.amerigeoss.org/dataset/14a4d1aa-2b7e-44c5-b0e2-96a656b04bd9/resource/f36057f6-6ad6-4953-a6be-cd45afc90300> ;
    dcat:keyword "AmeriGEO",
        "AmeriGEOSS",
        "CKAN",
        "GEO",
        "GEOSS",
        "National",
        "North America",
        "United States",
        "aeromagnetic",
        "aeromagnetic data",
        "aeromagnetic map",
        "airborne geophysical survey",
        "alaska",
        "analytic signal",
        "apparent resistivity contours",
        "apparent resistivity data",
        "apparent resistivity map",
        "apparent resistivity survey",
        "border ranges fault",
        "chugach terrane",
        "electromagnetic anomalies",
        "electromagnetic data",
        "electromagnetic survey",
        "first vertical derivative",
        "geophysical map",
        "geophysical survey",
        "geophysics",
        "geophysics search tag",
        "gridded data",
        "hem survey",
        "hfem survey",
        "magnetic contours",
        "magnetic data",
        "magnetic survey",
        "magnetics",
        "nelchina mining district",
        "peninsula terrane",
        "raster image",
        "resistivity",
        "state of",
        "strategic minerals",
        "valdez quadrangle" .

<https://data.amerigeoss.org/dataset/14a4d1aa-2b7e-44c5-b0e2-96a656b04bd9/resource/034b46f0-6d07-411b-88a8-6f03d6d95ed9> a dcat:Distribution ;
    dct:issued "2023-07-05T20:27:14.898783"^^xsd:dateTime ;
    dct:modified "2025-09-23T23:46:57.541790"^^xsd:dateTime ;
    dct:title "Web Resource" ;
    dcat:accessURL <http://dx.doi.org/10.14509/29169> .

<https://data.amerigeoss.org/dataset/14a4d1aa-2b7e-44c5-b0e2-96a656b04bd9/resource/f36057f6-6ad6-4953-a6be-cd45afc90300> a dcat:Distribution ;
    dct:description "CSDGM IMPORT ERROR: No digtinfo/formcont" ;
    dct:issued "2023-07-05T20:27:14.898779"^^xsd:dateTime ;
    dct:modified "2025-09-23T23:46:57.540859"^^xsd:dateTime ;
    dct:title "GeoTiff, ESRI shapefile, Geosoft binary grid, Microsoft Office documents, PDF, ER Mapper ERS, ASCII text files (including CSV), Geosoft ascii grid (GXF), Geosoft database, AutoCAD DXF, Geosoft PLT, Printer file type HPP, Geosoft ASCII XYZ, and KMZ" ;
    dcat:accessURL <http://dx.doi.org/10.14509/29169> .

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