@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/4157398c-a65d-4cd5-b412-e8a6bb781509> a dcat:Dataset ;
    dct:description "Three-dimensional point clouds (LAZ format) were developed from underwater images collected near Dollar Point in Lake Tahoe, California, and processed using Structure-from-Motion (SfM) photogrammetry techniques. Point cloud data include x,y,z positions, RGB colors, Metashape-computed confidence values, and a two-class classification ('unclassified' and 'high noise') derived from the confidence values. LAZ is an open format developed for the efficient use of point cloud lidar data. A description of the LAZ format and links to software tools for using LAZ files are provided at the USGS website: https://www.usgs.gov/news/3d-elevation-program-distributing-lidar-data-laz-format" ;
    dct:identifier "USGS:0c6aee0e-f15d-402e-83cc-103dc31a94bc" ;
    dct:issued "2025-11-21T06:10:41.598132"^^xsd:dateTime ;
    dct:modified "20211217"^^xsd:gYear ;
    dct:publisher <https://data.amerigeoss.org/organization/727dbdd5-3f98-4ac0-9d28-5e344558139b> ;
    dct:spatial [ a dct:Location ;
            locn:geometry "POLYGON ((-120.1041 39.1771, -120.1041 39.1805, -120.0993 39.1805, -120.0993 39.1771, -120.1041 39.1771))"^^gsp:wktLiteral ] ;
    dct:title "Point cloud data of Lake Tahoe near Dollar Point" ;
    dcat:contactPoint [ a vcard:Organization ;
            vcard:fn "PCMSC Science Data Coordinator" ;
            vcard:hasEmail <mailto:pcmsc_data@usgs.gov> ] ;
    dcat:distribution <https://data.amerigeoss.org/dataset/4157398c-a65d-4cd5-b412-e8a6bb781509/resource/b40206ee-a406-417a-9cbb-194d5b63a702>,
        <https://data.amerigeoss.org/dataset/4157398c-a65d-4cd5-b412-e8a6bb781509/resource/f9555c7c-7fa9-4e25-be60-9dd9632c2df9> ;
    dcat:keyword "amerigeo",
        "amerigeoss",
        "ckan",
        "cmhrp",
        "coastal-and-marine-hazards-and-resources-program",
        "geo",
        "geospatial-datasets",
        "geoss",
        "inlandwaters",
        "lake-bed",
        "lake-tahoe",
        "lakebed-characteristics",
        "national",
        "north-america",
        "pacific-coastal-and-marine-science-center",
        "pcmsc",
        "physical-habitats-and-geomorphology",
        "remote-sensing",
        "sediment",
        "spcmsc",
        "st-petersburg-coastal-and-marine-science-center",
        "state-of-california",
        "structure-from-motion",
        "u-s-geological-survey",
        "united-states",
        "usgs",
        "usgs-0c6aee0e-f15d-402e-83cc-103dc31a94bc",
        "visible-light-imaging" ;
    dcat:theme <%7Bgeospatial%7D> .

<https://data.amerigeoss.org/dataset/4157398c-a65d-4cd5-b412-e8a6bb781509/resource/b40206ee-a406-417a-9cbb-194d5b63a702> a dcat:Distribution ;
    dct:description "The metadata original format" ;
    dct:format "XML" ;
    dct:issued "2022-08-07T11:19:05.044967"^^xsd:dateTime ;
    dct:modified "2025-11-21T06:10:41.583736"^^xsd:dateTime ;
    dct:title "Original Metadata" ;
    dcat:accessURL <https://data.usgs.gov/datacatalog/metadata/USGS.0c6aee0e-f15d-402e-83cc-103dc31a94bc.xml> ;
    dcat:mediaType "text/xml" .

<https://data.amerigeoss.org/dataset/4157398c-a65d-4cd5-b412-e8a6bb781509/resource/f9555c7c-7fa9-4e25-be60-9dd9632c2df9> a dcat:Distribution ;
    dct:description "Landing page for access to the data" ;
    dct:format "XML" ;
    dct:issued "2022-08-07T11:19:05.044973"^^xsd:dateTime ;
    dct:modified "2025-11-21T06:10:41.584152"^^xsd:dateTime ;
    dct:title "Digital Data" ;
    dcat:accessURL <https://doi.org/10.5066/P9934I6U> ;
    dcat:mediaType "application/http" .

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