@prefix dcat: <http://www.w3.org/ns/dcat#> .
@prefix dct: <http://purl.org/dc/terms/> .
@prefix foaf: <http://xmlns.com/foaf/0.1/> .
@prefix hydra: <http://www.w3.org/ns/hydra/core#> .
@prefix spdx: <http://spdx.org/rdf/terms#> .
@prefix vcard: <http://www.w3.org/2006/vcard/ns#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .

<https://digitwin.geoecomar.ro/catalog.n3?page=1> a hydra:PagedCollection ;
    hydra:first "https://digitwin.geoecomar.ro/catalog.n3?page=1" ;
    hydra:firstPage "https://digitwin.geoecomar.ro/catalog.n3?page=1" ;
    hydra:itemsPerPage 100 ;
    hydra:last "https://digitwin.geoecomar.ro/catalog.n3?page=1" ;
    hydra:lastPage "https://digitwin.geoecomar.ro/catalog.n3?page=1" ;
    hydra:totalItems 1 .

<https://digitwin.geoecomar.ro> a dcat:Catalog ;
    dct:description "Innovative system for managing the dynamics of the Romanian Black Sea coastline through the integration of direct measurements, numerical modeling, and remote sensing for the creation of the ‘Digital Twin’ of Romania’s Coastal Zone." ;
    dct:language "en" ;
    dct:modified "2026-02-05T08:42:44.772879"^^xsd:dateTime ;
    dct:title "The Digital Twin of Romania’s Coastal Zone." ;
    dcat:dataset <https://digitwin.geoecomar.ro/dataset/7c01f450-1a2d-4e05-8150-6fe724ad0577> ;
    foaf:homepage <https://digitwin.geoecomar.ro> .

<https://digitwin.geoecomar.ro/dataset/7c01f450-1a2d-4e05-8150-6fe724ad0577> a dcat:Dataset ;
    dct:description "The Danube Delta shoreline has experienced significant changes due to both natural processes and human activities. This study investigates the shoreline dynamics of the Danube Delta from 2016 to 2023, focusing on its central and southern sedimentary cells, which include Sulina, Canalul cu Sondă, Câsla Vădanei, Sfântu Gheorghe, Sahalin North and South, Perișor, Periteasca, Portița North and South, and Periboina sectors. Using GNSS RTK technology, shoreline positions were measured annually during the summer months between 2016 and 2023. The measurements were analysed with QGIS software to  calculate  shoreline  change  rates  and  trends.  The  results  highlight  the  variability  in  shoreline  dynamics  across  different  sectors.  Erosion  predominates  in several areas, while other sectors exhibit stability or accretion. Key factors influencing these changes include sediment redistribution through waves, currents,  and  river  processes,  as  well  as  human  interventions  such  as  coastal  structures.  Vegetation  in  certain  areas  may  also  play  a  role  in  mitigating  erosion. This study provides an overview of the Danube Delta’s evolving coastline and the factors shaping it" ;
    dct:identifier "7c01f450-1a2d-4e05-8150-6fe724ad0577" ;
    dct:issued "2026-02-05T08:42:29.109357"^^xsd:dateTime ;
    dct:modified "2026-02-05T08:42:44.772879"^^xsd:dateTime ;
    dct:publisher <https://digitwin.geoecomar.ro/organization/9645be49-8154-4757-bc19-9eaa84e76483> ;
    dct:title "Shoreline dynamics of the Danube Delta (2016 - 2023) measured using GNSS -RTK Technology" ;
    dcat:contactPoint [ a vcard:Organization ;
            vcard:fn "Cristian Cudalbu" ;
            vcard:hasEmail <mailto:c.cudalbu@geoecomar.ro> ] ;
    dcat:distribution <https://digitwin.geoecomar.ro/dataset/7c01f450-1a2d-4e05-8150-6fe724ad0577/resource/0cd0a953-49d0-46b1-a1fa-b31dec2108ed>,
        <https://digitwin.geoecomar.ro/dataset/7c01f450-1a2d-4e05-8150-6fe724ad0577/resource/a76503db-4fc2-411a-a957-90c7c65d7ecc> ;
    dcat:keyword "GNSS",
        "accretion",
        "change rate",
        "coastal dynamics",
        "erosion",
        "trend" .

<https://digitwin.geoecomar.ro/dataset/7c01f450-1a2d-4e05-8150-6fe724ad0577/resource/0cd0a953-49d0-46b1-a1fa-b31dec2108ed> a dcat:Distribution ;
    dct:format "PDF" ;
    dct:issued "2026-02-05T08:42:44.179947"^^xsd:dateTime ;
    dct:modified "2026-02-05T08:42:44.778442"^^xsd:dateTime ;
    dct:title "document.pdf" ;
    dcat:accessURL <https://digitwin.geoecomar.ro/dataset/7c01f450-1a2d-4e05-8150-6fe724ad0577/resource/0cd0a953-49d0-46b1-a1fa-b31dec2108ed/download/document.pdf> ;
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    dcat:mediaType "application/pdf" .

<https://digitwin.geoecomar.ro/dataset/7c01f450-1a2d-4e05-8150-6fe724ad0577/resource/a76503db-4fc2-411a-a957-90c7c65d7ecc> a dcat:Distribution ;
    dct:format "TXT" ;
    dct:issued "2026-02-05T08:42:29.205147"^^xsd:dateTime ;
    dct:modified "2026-02-05T08:42:43.724023"^^xsd:dateTime ;
    dct:title "additional_info.txt" ;
    spdx:checksum [ a spdx:Checksum ;
            spdx:checksumValue "1a1242cf3bf964d5b29a2227d39c009bf75bd854"^^xsd:hexBinary ] ;
    dcat:accessURL <https://digitwin.geoecomar.ro/dataset/7c01f450-1a2d-4e05-8150-6fe724ad0577/resource/a76503db-4fc2-411a-a957-90c7c65d7ecc/download/additional_info.txt> ;
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    dcat:mediaType "text/plain" .

<https://digitwin.geoecomar.ro/organization/9645be49-8154-4757-bc19-9eaa84e76483> a foaf:Agent ;
    foaf:name "Digital Twin" .