@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/20d837be-9317-4afb-9ab3-4ae7035bbce0> a dcat:Dataset ;
    dct:description """Modeled ground magnetic data was extracted from the Pan American Center for Earth and Environmental Studies database at http://irpsrvgis08.utep.edu/viewers/Flex/GravityMagnetic/GravityMagnetic_CyberShare/ on 2/29/2012. The downloaded text file was then imported into an Excel spreadsheet. This spreadsheet data was converted into an ESRI point shapefile in UTM Zone 13 NAD27 projection, showing location and magnetic field strength in nano-Teslas. This point shapefile was then interpolated to an ESRI grid using an inverse-distance weighting method, using ESRI Spatial Analyst. The grid was used to create a contour map of magnetic field strength.
""" ;
    dct:identifier <https://data.openei.org/submissions/3184> ;
    dct:issued "2012-03-08T07:00:00+00:00"^^xsd:dateTime ;
    dct:modified "2021-08-24T21:34:40+00:00"^^xsd:dateTime ;
    dct:publisher <https://data.amerigeoss.org/organization/727dbdd5-3f98-4ac0-9d28-5e344558139b> ;
    dct:spatial [ a dct:Location ;
            locn:geometry "POLYGON ((-108.5764 36.9326, -104.7203 36.9326, -104.7203 40.9751, -108.5764 40.9751, -108.5764 36.9326))"^^gsp:wktLiteral ] ;
    dct:title "Ground Magnetic Data for West-Central Colorado" ;
    dcat:contactPoint [ a vcard:Organization ;
            vcard:fn "Richard Zehner" ;
            vcard:hasEmail <mailto:rzehner@gdareno.com> ] ;
    dcat:distribution <https://data.amerigeoss.org/dataset/20d837be-9317-4afb-9ab3-4ae7035bbce0/resource/67080ad9-ae65-44e6-9fa5-3b9f7c4fcab7> ;
    dcat:keyword "amerigeo",
        "amerigeoss",
        "arcgis",
        "central",
        "ckan",
        "colorado",
        "data",
        "field-strength",
        "geo",
        "geospatial",
        "geospatial-data",
        "geoss",
        "geothermal",
        "gis",
        "ground",
        "magnetic",
        "magnetics",
        "national",
        "north-america",
        "point-shapefile",
        "shape-file",
        "shapefile",
        "united-states",
        "west",
        "west-central" .

<https://data.amerigeoss.org/dataset/20d837be-9317-4afb-9ab3-4ae7035bbce0/resource/67080ad9-ae65-44e6-9fa5-3b9f7c4fcab7> a dcat:Distribution ;
    dct:description """Ground magnetic data for west-central Colorado extracted from the Pan American Center for Earth and Environmental Studies database. Includes the raw spreadsheet data, an ESRI point shapefile showing magnetic sample locations and magnetic field strength, and an ESRI line shapefile showing magnetic contours. 
Projection: UTM Zone 13 NAD27""" ;
    dct:format "ZIP" ;
    dct:issued "2022-08-08T11:20:24.421943"^^xsd:dateTime ;
    dct:modified "2025-11-20T10:11:46.105119"^^xsd:dateTime ;
    dct:title "Magnetic Data.zip" ;
    dcat:accessURL <https://gdr.openei.org/files/341/MagneticDataWestCentralColorado.zip> ;
    dcat:mediaType "application/zip" .

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