@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 owl: <http://www.w3.org/2002/07/owl#> .
@prefix schema: <http://schema.org/> .
@prefix vcard: <http://www.w3.org/2006/vcard/ns#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .

<https://data.g-e-m.dk/datasets/10.17897/TQTT-EV69> a schema:DataDownload,
        schema:Dataset,
        dcat:Dataset,
        dcat:Distribution,
        foaf:Document ;
    dct:bibliographicCitation "Read the documentation, GEM terms of use and how to cite: https://data.g-e-m.dk/guides. Please get in touch with the GEM secretariat if you need help to cite correctly." ;
    dct:description "The progression in the vegetation greenness  (Normalized Difference Vegetation Index; NDVI) is followed in the plant phenology plots on a weekly basis. NDVI is measured by a RapidSCAN CS-45 Handheld System and scans are conducted by moving the sensor steadily forward (ca. 1 meter per second) approximately 75 cm above the vegetation. This results in a measuring footprint of approximately 10 x 45 m. For further details, please refer to the newest BioBasis manual available at the website." ;
    dct:identifier "https://data.g-e-m.dk/datasets/10.17897/TQTT-EV69" ;
    dct:issued "2026-05-20T13:14:44.487398"^^xsd:dateTime,
        "2026-05-20T16:12:54.708693"^^xsd:dateTime ;
    dct:modified "2026-05-20T16:12:54.699677"^^xsd:dateTime,
        "2026-05-20T16:12:54.702150"^^xsd:dateTime ;
    dct:publisher [ a foaf:Agent ;
            foaf:homepage <https://data.g-e-m.dk> ;
            foaf:name "Greenland Ecosystem Monitoring" ],
        [ a foaf:Agent ;
            foaf:homepage <https://data.g-e-m.dk> ;
            foaf:name "Greenland Ecosystem Monitoring" ] ;
    dct:spatial [ a dct:Location ;
            locn:geometry "POLYGON ((-51.3800 64.1300, -51.3800 64.1300, -51.3800 64.1300, -51.3800 64.1300))"^^gsp:wktLiteral ] ;
    dct:temporal [ a dct:PeriodOfTime ;
            dcat:endDate "2025-09-30"^^xsd:date ;
            dcat:startDate "2018-07-18"^^xsd:date ],
        [ a dct:PeriodOfTime ;
            dcat:endDate "2025-09-30"^^xsd:date ;
            dcat:startDate "2018-07-18"^^xsd:date ] ;
    dct:title "Plot NDVI" ;
    schema:about [ a schema:Thing ;
            schema:name "greenland-institute-of-natural-resources" ] ;
    schema:citation "Read the documentation, GEM terms of use and how to cite: https://data.g-e-m.dk/guides. Please get in touch with the GEM secretariat if you need help to cite correctly." ;
    schema:creator [ a schema:Organization ;
            schema:contactPoint [ a schema:ContactPoint ;
                    schema:contactType "customer service" ;
                    schema:name "University of Copenhagen (UCPH - Partner 3)" ;
                    schema:url "https://data.g-e-m.dk/datasets/10.17897/TQTT-EV69" ] ;
            schema:name "University of Copenhagen (UCPH - Partner 3)" ] ;
    schema:dateModified "2026-05-20T16:12:54.699677" ;
    schema:datePublished "2020-01-01",
        "2020-01-01T00:00:00" ;
    schema:description "The progression in the vegetation greenness  (Normalized Difference Vegetation Index; NDVI) is followed in the plant phenology plots on a weekly basis. NDVI is measured by a RapidSCAN CS-45 Handheld System and scans are conducted by moving the sensor steadily forward (ca. 1 meter per second) approximately 75 cm above the vegetation. This results in a measuring footprint of approximately 10 x 45 m. For further details, please refer to the newest BioBasis manual available at the website." ;
    schema:distribution <https://data.g-e-m.dk/datasets/10.17897/TQTT-EV69> ;
    schema:identifier "https://data.g-e-m.dk/datasets/10.17897/TQTT-EV69" ;
    schema:keywords "ARCTIC",
        "BIOLOGY",
        "BIOSPHERE",
        "CLIMATE INDICATORS",
        "ECOSYSTEMS",
        "GREENLAND",
        "TERRESTRIAL ECOSYSTEMS",
        "VEGETATION" ;
    schema:license "https://creativecommons.org/licenses/by-sa/4.0/" ;
    schema:name "Plot NDVI" ;
    schema:publisher [ a schema:Organization ;
            schema:contactPoint [ a schema:ContactPoint ;
                    schema:contactType "customer service" ;
                    schema:name "Greenland Ecosystem Monitoring" ;
                    schema:url "https://data.g-e-m.dk" ] ;
            schema:name "Greenland Ecosystem Monitoring" ] ;
    schema:spatialCoverage [ a schema:Place ;
            schema:geo [ a schema:GeoShape ;
                    schema:polygon "{\"type\": \"Polygon\", \"coordinates\": [[[-51.38, 64.13], [-51.38, 64.13], [-51.38, 64.13], [-51.38, 64.13]]]}" ] ] ;
    schema:temporalCoverage "2018-07-18/2025-09-30" ;
    schema:url "https://data.g-e-m.dk/datasets/10.17897/TQTT-EV69" ;
    schema:variableMeasured [ a schema:PropertyValue ;
            schema:description "Normalized difference red edge index" ;
            schema:name "NDRE" ;
            schema:propertyID <https://data.g-e-m.dk/datasets/10.17897/TQTT-EV69#column=NDRE> ;
            schema:unitText "NA" ;
            schema:url <https://data.g-e-m.dk/datasets/10.17897/TQTT-EV69#column=NDRE> ],
        [ a schema:PropertyValue ;
            schema:description "Remarks" ;
            schema:name "Remarks" ;
            schema:propertyID <https://data.g-e-m.dk/datasets/10.17897/TQTT-EV69#column=Remarks> ;
            schema:unitText "Text" ;
            schema:url <https://data.g-e-m.dk/datasets/10.17897/TQTT-EV69#column=Remarks> ],
        [ a schema:PropertyValue ;
            schema:description "Minimum NDVI" ;
            schema:name "MINNDVI" ;
            schema:propertyID <https://data.g-e-m.dk/datasets/10.17897/TQTT-EV69#column=MINNDVI> ;
            schema:unitText "NA" ;
            schema:url <https://data.g-e-m.dk/datasets/10.17897/TQTT-EV69#column=MINNDVI> ],
        [ a schema:PropertyValue ;
            schema:description "Date of measurement" ;
            schema:name "Date" ;
            schema:propertyID <https://data.g-e-m.dk/datasets/10.17897/TQTT-EV69#column=Date> ;
            schema:unitText "Date" ;
            schema:url <https://data.g-e-m.dk/datasets/10.17897/TQTT-EV69#column=Date> ],
        [ a schema:PropertyValue ;
            schema:description "Standard deviation NDVI" ;
            schema:name "STDNDVI" ;
            schema:propertyID <https://data.g-e-m.dk/datasets/10.17897/TQTT-EV69#column=STDNDVI> ;
            schema:unitText "NA" ;
            schema:url <https://data.g-e-m.dk/datasets/10.17897/TQTT-EV69#column=STDNDVI> ],
        [ a schema:PropertyValue ;
            schema:description "Normalized difference vegeation index" ;
            schema:name "NDVI" ;
            schema:propertyID <https://data.g-e-m.dk/datasets/10.17897/TQTT-EV69#column=NDVI> ;
            schema:unitText "NA" ;
            schema:url <https://data.g-e-m.dk/datasets/10.17897/TQTT-EV69#column=NDVI> ],
        [ a schema:PropertyValue ;
            schema:description "Maximum NDVI" ;
            schema:name "MAXNDVI" ;
            schema:propertyID <https://data.g-e-m.dk/datasets/10.17897/TQTT-EV69#column=MAXNDVI> ;
            schema:unitText "NA" ;
            schema:url <https://data.g-e-m.dk/datasets/10.17897/TQTT-EV69#column=MAXNDVI> ],
        [ a schema:PropertyValue ;
            schema:description "Photo ID" ;
            schema:name "Photo_no" ;
            schema:propertyID <https://data.g-e-m.dk/datasets/10.17897/TQTT-EV69#column=Photo_no> ;
            schema:unitText "Text" ;
            schema:url <https://data.g-e-m.dk/datasets/10.17897/TQTT-EV69#column=Photo_no> ],
        [ a schema:PropertyValue ;
            schema:description "Species ID" ;
            schema:name "Species" ;
            schema:propertyID <https://data.g-e-m.dk/datasets/10.17897/TQTT-EV69#column=Species> ;
            schema:unitText "Text" ;
            schema:url <https://data.g-e-m.dk/datasets/10.17897/TQTT-EV69#column=Species> ],
        [ a schema:PropertyValue ;
            schema:description "Number of samples per scan" ;
            schema:name "N" ;
            schema:propertyID <https://data.g-e-m.dk/datasets/10.17897/TQTT-EV69#column=N> ;
            schema:unitText "Number" ;
            schema:url <https://data.g-e-m.dk/datasets/10.17897/TQTT-EV69#column=N> ],
        [ a schema:PropertyValue ;
            schema:description "Minimum NDRE" ;
            schema:name "MINNDRE" ;
            schema:propertyID <https://data.g-e-m.dk/datasets/10.17897/TQTT-EV69#column=MINNDRE> ;
            schema:unitText "NA" ;
            schema:url <https://data.g-e-m.dk/datasets/10.17897/TQTT-EV69#column=MINNDRE> ],
        [ a schema:PropertyValue ;
            schema:description "Section ID" ;
            schema:name "Section" ;
            schema:propertyID <https://data.g-e-m.dk/datasets/10.17897/TQTT-EV69#column=Section> ;
            schema:unitText "Text" ;
            schema:url <https://data.g-e-m.dk/datasets/10.17897/TQTT-EV69#column=Section> ],
        [ a schema:PropertyValue ;
            schema:description "Latitude of mid-point in section" ;
            schema:name "Latitude" ;
            schema:propertyID <https://data.g-e-m.dk/datasets/10.17897/TQTT-EV69#column=Latitude> ;
            schema:unitText "Number" ;
            schema:url <https://data.g-e-m.dk/datasets/10.17897/TQTT-EV69#column=Latitude> ],
        [ a schema:PropertyValue ;
            schema:description "Horizontal dilution of precision" ;
            schema:name "HDOP" ;
            schema:propertyID <https://data.g-e-m.dk/datasets/10.17897/TQTT-EV69#column=HDOP> ;
            schema:unitText "Number" ;
            schema:url <https://data.g-e-m.dk/datasets/10.17897/TQTT-EV69#column=HDOP> ],
        [ a schema:PropertyValue ;
            schema:description "Plot ID" ;
            schema:name "Plot" ;
            schema:propertyID <https://data.g-e-m.dk/datasets/10.17897/TQTT-EV69#column=Plot> ;
            schema:unitText "Text" ;
            schema:url <https://data.g-e-m.dk/datasets/10.17897/TQTT-EV69#column=Plot> ],
        [ a schema:PropertyValue ;
            schema:description "Maximum NDRE" ;
            schema:name "MAXNDRE" ;
            schema:propertyID <https://data.g-e-m.dk/datasets/10.17897/TQTT-EV69#column=MAXNDRE> ;
            schema:unitText "NA" ;
            schema:url <https://data.g-e-m.dk/datasets/10.17897/TQTT-EV69#column=MAXNDRE> ],
        [ a schema:PropertyValue ;
            schema:description "Standard deviation NDRE" ;
            schema:name "STDNDRE" ;
            schema:propertyID <https://data.g-e-m.dk/datasets/10.17897/TQTT-EV69#column=STDNDRE> ;
            schema:unitText "NA" ;
            schema:url <https://data.g-e-m.dk/datasets/10.17897/TQTT-EV69#column=STDNDRE> ],
        [ a schema:PropertyValue ;
            schema:description "Elevation" ;
            schema:name "Elevation" ;
            schema:propertyID <https://data.g-e-m.dk/datasets/10.17897/TQTT-EV69#column=Elevation> ;
            schema:unitText "M" ;
            schema:url <https://data.g-e-m.dk/datasets/10.17897/TQTT-EV69#column=Elevation> ],
        [ a schema:PropertyValue ;
            schema:description "Reflectance red" ;
            schema:name "R" ;
            schema:propertyID <https://data.g-e-m.dk/datasets/10.17897/TQTT-EV69#column=R> ;
            schema:unitText "NA" ;
            schema:url <https://data.g-e-m.dk/datasets/10.17897/TQTT-EV69#column=R> ],
        [ a schema:PropertyValue ;
            schema:description "Reflectance red edge" ;
            schema:name "RE" ;
            schema:propertyID <https://data.g-e-m.dk/datasets/10.17897/TQTT-EV69#column=RE> ;
            schema:unitText "NA" ;
            schema:url <https://data.g-e-m.dk/datasets/10.17897/TQTT-EV69#column=RE> ],
        [ a schema:PropertyValue ;
            schema:description "GPS fix type" ;
            schema:name "Fixtype" ;
            schema:propertyID <https://data.g-e-m.dk/datasets/10.17897/TQTT-EV69#column=Fixtype> ;
            schema:unitText "Text" ;
            schema:url <https://data.g-e-m.dk/datasets/10.17897/TQTT-EV69#column=Fixtype> ],
        [ a schema:PropertyValue ;
            schema:description "Longitude of mid-point in section" ;
            schema:name "Longitude" ;
            schema:propertyID <https://data.g-e-m.dk/datasets/10.17897/TQTT-EV69#column=Longitude> ;
            schema:unitText "Number" ;
            schema:url <https://data.g-e-m.dk/datasets/10.17897/TQTT-EV69#column=Longitude> ],
        [ a schema:PropertyValue ;
            schema:description "Coefficient of variation NDVI" ;
            schema:name "CVNDVI" ;
            schema:propertyID <https://data.g-e-m.dk/datasets/10.17897/TQTT-EV69#column=CVNDVI> ;
            schema:unitText "NA" ;
            schema:url <https://data.g-e-m.dk/datasets/10.17897/TQTT-EV69#column=CVNDVI> ],
        [ a schema:PropertyValue ;
            schema:description "Near infrared" ;
            schema:name "NIR" ;
            schema:propertyID <https://data.g-e-m.dk/datasets/10.17897/TQTT-EV69#column=NIR> ;
            schema:unitText "NA" ;
            schema:url <https://data.g-e-m.dk/datasets/10.17897/TQTT-EV69#column=NIR> ],
        [ a schema:PropertyValue ;
            schema:description "Coefficient of variation NDRE" ;
            schema:name "CVNDRE" ;
            schema:propertyID <https://data.g-e-m.dk/datasets/10.17897/TQTT-EV69#column=CVNDRE> ;
            schema:unitText "NA" ;
            schema:url <https://data.g-e-m.dk/datasets/10.17897/TQTT-EV69#column=CVNDRE> ] ;
    schema:version "1" ;
    owl:versionInfo "1" ;
    dcat:accessURL <https://data.g-e-m.dk/datasets/10.17897/TQTT-EV69> ;
    dcat:contactPoint [ a vcard:Organization ;
            vcard:fn "[{\"author_name\": \"Greenland Ecosystem Monitoring\"}]" ] ;
    dcat:distribution <https://data.g-e-m.dk/datasets/10.17897/TQTT-EV69> ;
    dcat:keyword "ARCTIC",
        "BIOLOGY",
        "BIOSPHERE",
        "CLIMATE INDICATORS",
        "ECOSYSTEMS",
        "GREENLAND",
        "TERRESTRIAL ECOSYSTEMS",
        "VEGETATION" ;
    dcat:landingPage <https://data.g-e-m.dk/datasets/10.17897/TQTT-EV69> ;
    dcat:theme "greenland-institute-of-natural-resources" .

