@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/7ca73b83-9452-4ab3-8d87-a7d749483e3c> a dcat:Dataset ;
    dct:description "This dataset contains the Flow Accumulation (FA) for North America from the Hydrologic Derivatives for Modeling and Analysis (HDMA) database. The FA data were developed and distributed by processing units. There are 13 processing units for North America. The distribution files have the number of the processing unit appended to the end of the zip file name (e.g. na_fa_3_2.zip contains the flow accumulation data for unit 3-2). The HDMA database provides comprehensive and consistent global coverage of raster and vector topographically derived layers, including raster layers of digital elevation model (DEM) data, flow direction, flow accumulation, slope, and compound topographic index (CTI); and vector layers of streams and catchment boundaries. The coverage of the data is global (-180º, 180º, -90º, 90º) with the underlying DEM being a hybrid of three datasets: HydroSHEDS (Hydrological data and maps based on SHuttle Elevation Derivatives at multiple Scales), Global Multi-resolution Terrain Elevation Data 2010 (GMTED2010) and the Shuttle Radar Topography Mission (SRTM). For most of the globe south of 60º North, the raster resolution of the data is 3-arc-seconds, corresponding to the resolution of the SRTM. For the areas North of 60º, the resolution is 7.5-arc-seconds (the smallest resolution of the GMTED2010 dataset) except for Greenland, where the resolution is 30-arc-seconds. The streams and catchments are attributed with Pfafstetter codes, based on a hierarchical numbering system, that carry important topological information." ;
    dct:identifier "USGS:591b53f6e4b0a7fdb43c8d22" ;
    dct:issued "2025-11-22T22:00:22.394255"^^xsd:dateTime ;
    dct:modified "20200814"^^xsd:gYear ;
    dct:publisher <https://data.amerigeoss.org/organization/727dbdd5-3f98-4ac0-9d28-5e344558139b> ;
    dct:spatial [ a dct:Location ;
            locn:geometry "POLYGON ((-179.1479 7.1100, -179.1479 83.1374, -52.6183 83.1374, -52.6183 7.1100, -179.1479 7.1100))"^^gsp:wktLiteral ] ;
    dct:title "Flow accumulation from the Hydrologic Derivatives for Modeling and Analysis (HDMA) database -- North America" ;
    dcat:contactPoint [ a vcard:Organization ;
            vcard:fn "Kristine L Verdin" ;
            vcard:hasEmail <mailto:kverdin@usgs.gov> ] ;
    dcat:distribution <https://data.amerigeoss.org/dataset/7ca73b83-9452-4ab3-8d87-a7d749483e3c/resource/6228bb42-c97e-4b02-b25f-12093e829e58>,
        <https://data.amerigeoss.org/dataset/7ca73b83-9452-4ab3-8d87-a7d749483e3c/resource/98ee251d-5ce5-4095-b9c5-b43111f4d110> ;
    dcat:keyword "amerigeo",
        "amerigeoss",
        "ckan",
        "dem-stream-hydrologic-derivatives-pfafstetter",
        "digital-elevation-models",
        "elevation",
        "geo",
        "geoss",
        "inlandwaters",
        "national",
        "north-america",
        "pfafstetter",
        "streams",
        "united-states",
        "usgs-591b53f6e4b0a7fdb43c8d22" ;
    dcat:theme <%7Bgeospatial%7D> .

<https://data.amerigeoss.org/dataset/7ca73b83-9452-4ab3-8d87-a7d749483e3c/resource/6228bb42-c97e-4b02-b25f-12093e829e58> a dcat:Distribution ;
    dct:description "The metadata original format" ;
    dct:format "XML" ;
    dct:issued "2022-07-28T21:23:49.905539"^^xsd:dateTime ;
    dct:modified "2025-11-22T22:00:22.385094"^^xsd:dateTime ;
    dct:title "Original Metadata" ;
    dcat:accessURL <https://data.usgs.gov/datacatalog/metadata/USGS.591b53f6e4b0a7fdb43c8d22.xml> ;
    dcat:mediaType "text/xml" .

<https://data.amerigeoss.org/dataset/7ca73b83-9452-4ab3-8d87-a7d749483e3c/resource/98ee251d-5ce5-4095-b9c5-b43111f4d110> a dcat:Distribution ;
    dct:description "Landing page for access to the data" ;
    dct:format "XML" ;
    dct:issued "2022-07-28T21:23:49.905546"^^xsd:dateTime ;
    dct:modified "2025-11-22T22:00:22.385501"^^xsd:dateTime ;
    dct:title "Digital Data" ;
    dcat:accessURL <https://doi.org/10.5066/F7S180ZP> ;
    dcat:mediaType "application/http" .

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