@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/35500849-76f0-4e76-8bc1-98b3e52a1c4a> a dcat:Dataset ;
    dct:description """This is a tiled collection of the 3D Elevation Program (3DEP) and is 2 arc-second
            (approximately 60 m) resolution covering Alaska. The elevations in this Digital
            Elevation Model (DEM) represent the topographic bare-earth surface. The 3DEP data
            holdings serve as the elevation layer of The National Map, and provide foundational
            elevation information for earth science studies and mapping applications in the United
            States. Scientists and resource managers use 3DEP data for hydrologic modeling, resource
            monitoring, mapping and visualization, and many other applications. The seamless 2
            arc-second DEM layers are derived from diverse source data that are processed to a
            common coordinate system and unit of vertical measure. These data are distributed in
            geographic coordinates in units of decimal degrees, and in conformance with the North
            American Datum of 1983 (NAD 83). All elevation values are in meters and, over the
            continental United States, are referenced to the North American Vertical Datum of 1988
            (NAVD88). The seamless 2 arc-second DEM layer provides coverage of the Alaska only. The
            seamless 2 arc-second DEM is available as pre-staged products tiled in 1 degree blocks
            in Erdas .img, ESRI arc-grid, and grid float formats. The seamless 2 arc-second DEM
            layer is updated continually as new data become available over Alaska. Other 3DEP
            products are nationally seamless DEMs in resolutions of ⅓ and 1 -arc-second. These
            seamless DEMs were referred to as the National Elevation Dataset (NED) from about 2000
            through 2015 at which time they became the seamless DEM layers under the 3DEP program
            and the NED name and system were retired. Other 3DEP products include one-meter DEMs
            produced exclusively from high resolution light detection and ranging (lidar) source
            data and five-meter DEMs in Alaska as well as various source datasets including the
            lidar point cloud and interferometric synthetic aperture radar (Ifsar) digital surface
            models and intensity images. All 3DEP products are public domain. """ ;
    dct:identifier "USGS:4bd95204-7a29-4bd4-acce-00551ecaf47a" ;
    dct:issued "2025-11-20T22:40:02.978178"^^xsd:dateTime ;
    dct:modified "20201113"^^xsd:gYear ;
    dct:publisher <https://data.amerigeoss.org/organization/727dbdd5-3f98-4ac0-9d28-5e344558139b> ;
    dct:spatial [ a dct:Location ;
            locn:geometry "POLYGON ((-180.0000 51.0003, -180.0000 72.0000, -127.0000 72.0000, -127.0000 51.0003, -180.0000 51.0003))"^^gsp:wktLiteral ] ;
    dct:title """Alaska 2 Arc-second Digital Elevation Models (DEMs) - USGS National Map 3DEP
               Downloadable Data Collection""" ;
    dcat:contactPoint [ a vcard:Organization ;
            vcard:fn "U.S. Geological Survey" ;
            vcard:hasEmail <mailto:tnm_help@usgs.gov> ] ;
    dcat:distribution <https://data.amerigeoss.org/dataset/35500849-76f0-4e76-8bc1-98b3e52a1c4a/resource/f25a5ce3-5ff8-41de-868e-00f359d691ad> ;
    dcat:keyword "1-degree-dem",
        "2-arc-second-dem",
        "3dep",
        "amerigeo",
        "amerigeoss",
        "bare-earth",
        "cartography",
        "ckan",
        "dem",
        "digital-elevation-model",
        "digital-mapping",
        "digital-terrain-model",
        "elevation",
        "elevation-theme",
        "geo",
        "geodata",
        "geoss",
        "gis",
        "grid",
        "high-resolution",
        "hydro-flattened",
        "ifsar",
        "interferometric-synthetic-aperture-radar",
        "lidar",
        "light-detection-and-ranging",
        "mapping",
        "national",
        "national-elevation-dataset",
        "national-geospatial-data-asset",
        "ned",
        "ngda",
        "north-america",
        "raster",
        "terrain-elevation",
        "topographic-surface",
        "topography",
        "u-s-geological-survey",
        "united-states",
        "us",
        "usgs",
        "usgs-4bd95204-7a29-4bd4-acce-00551ecaf47a" ;
    dcat:theme <%7Bgeospatial%7D> .

<https://data.amerigeoss.org/dataset/35500849-76f0-4e76-8bc1-98b3e52a1c4a/resource/f25a5ce3-5ff8-41de-868e-00f359d691ad> a dcat:Distribution ;
    dct:description "The metadata original format" ;
    dct:format "XML" ;
    dct:issued "2022-07-28T21:42:40.967121"^^xsd:dateTime ;
    dct:modified "2025-11-20T22:40:02.958929"^^xsd:dateTime ;
    dct:title "Original Metadata" ;
    dcat:accessURL <https://data.usgs.gov/datacatalog/metadata/USGS.4bd95204-7a29-4bd4-acce-00551ecaf47a.xml> ;
    dcat:mediaType "text/xml" .

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