@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/1c661820-1510-4ac1-8c52-e943aba0c0d9> a dcat:Dataset ;
    dct:description "The U.S. Geological Survey maintains a program of water-quality studies in San Francisco Bay (CA) that began in 1969. We plan a USGS Data Release to archive and make available all measurements made from 1969 through 2015. Water-quality constituents include salinity, temperature, light attenuation coefficient, and concentrations of chlorophyll-a, dissolved oxygen, suspended particulate matter, nitrate, nitrite, ammonium, silicate and phosphate. Water samples are collected at 37 fixed sampling locations along a 145-km transect from lower South San Francisco Bayo the lower Sacramento River. A map of sampling locations is available on the project website at: https://sfbay.wr.usgs.gov/access/wqdata/overview/wherewhen/stnmap.html" ;
    dct:identifier "USGS:5841f97ee4b04fc80e518d9f" ;
    dct:issued "2025-11-20T07:40:39.929437"^^xsd:dateTime ;
    dct:modified "20210824"^^xsd:gYear ;
    dct:publisher <https://data.amerigeoss.org/organization/727dbdd5-3f98-4ac0-9d28-5e344558139b> ;
    dct:spatial [ a dct:Location ;
            locn:geometry "POLYGON ((122.4717 37.4717, 122.4717 38.1517, 121.6883 38.1517, 121.6883 37.4717, 122.4717 37.4717))"^^gsp:wktLiteral ] ;
    dct:title "USGS Measurements of Water Quality in San Francisco Bay (CA), 1969-2015" ;
    dcat:contactPoint [ a vcard:Organization ;
            vcard:fn "Tara Schraga" ;
            vcard:hasEmail <mailto:tschraga@usgs.gov> ] ;
    dcat:distribution <https://data.amerigeoss.org/dataset/1c661820-1510-4ac1-8c52-e943aba0c0d9/resource/bf84afbe-d792-4580-abd7-8df4155fe505>,
        <https://data.amerigeoss.org/dataset/1c661820-1510-4ac1-8c52-e943aba0c0d9/resource/eb73c4de-bf3b-4eed-9274-5366cac25d92> ;
    dcat:keyword "amerigeo",
        "amerigeoss",
        "chlorophyll-a",
        "ckan",
        "dissolved-oxygen",
        "geo",
        "geoss",
        "national",
        "north-america",
        "nutrients",
        "salinity",
        "temperature",
        "turbidity",
        "united-states",
        "usgs-5841f97ee4b04fc80e518d9f",
        "water-quality" ;
    dcat:theme <%7Bgeospatial%7D> .

<https://data.amerigeoss.org/dataset/1c661820-1510-4ac1-8c52-e943aba0c0d9/resource/bf84afbe-d792-4580-abd7-8df4155fe505> a dcat:Distribution ;
    dct:description "Landing page for access to the data" ;
    dct:format "XML" ;
    dct:issued "2022-07-28T21:35:51.446444"^^xsd:dateTime ;
    dct:modified "2025-11-20T07:40:39.919882"^^xsd:dateTime ;
    dct:title "Digital Data" ;
    dcat:accessURL <https://doi.org/10.5066/F7TQ5ZPR> ;
    dcat:mediaType "application/http" .

<https://data.amerigeoss.org/dataset/1c661820-1510-4ac1-8c52-e943aba0c0d9/resource/eb73c4de-bf3b-4eed-9274-5366cac25d92> a dcat:Distribution ;
    dct:description "The metadata original format" ;
    dct:format "XML" ;
    dct:issued "2022-07-28T21:35:51.446438"^^xsd:dateTime ;
    dct:modified "2025-11-20T07:40:39.919466"^^xsd:dateTime ;
    dct:title "Original Metadata" ;
    dcat:accessURL <https://data.usgs.gov/datacatalog/metadata/USGS.5841f97ee4b04fc80e518d9f.xml> ;
    dcat:mediaType "text/xml" .

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