@prefix dct: <http://purl.org/dc/terms/> .
@prefix pdssp: <https://pdssp.github.io/pdssp-ontology/vocab#> .
@prefix skos: <http://www.w3.org/2004/02/skos/core#> .
@prefix usgs: <https://apps.usgs.gov/thesaurus/> .

pdssp:ProductType-Anaglyph a skos:Concept ;
    skos:broader pdssp:ProductType-Image ;
    skos:definition "A red-cyan stereo composite built from two observations of the same site from different look angles, intended for viewing with red-cyan 3D glasses. Not present in the USGS Thesaurus's \"product types\" facet at all -- a PDSSP addition."@en ;
    skos:inScheme pdssp:ProductTypeScheme ;
    skos:prefLabel "Anaglyph"@en .

pdssp:ProductType-DigitalElevationModel a skos:Concept ;
    skos:altLabel "DEM"@en,
        "DTM"@en,
        "digital terrain model"@en ;
    skos:definition "A raster of elevation values, typically produced by stereo photogrammetry from two or more overlapping observations (see pdssp:Method-Photogrammetry)."@en ;
    skos:exactMatch usgs:digital%20elevation%20models ;
    skos:inScheme pdssp:ProductTypeScheme ;
    skos:prefLabel "Digital elevation model"@en .

pdssp:ProductType-ImageMosaic a skos:Concept ;
    skos:broader pdssp:ProductType-Image ;
    skos:definition "Two or more images combined into one composite raster covering a larger area."@en ;
    skos:exactMatch usgs:image%20mosaics ;
    skos:inScheme pdssp:ProductTypeScheme ;
    skos:prefLabel "Image mosaic"@en .

pdssp:ProductType-OrthoImage a skos:Concept ;
    skos:altLabel "orthoimagery"@en ;
    skos:broader pdssp:ProductType-Image ;
    skos:definition "An image that has been geometrically corrected (ortho-rectified) so its scale is uniform, typically by projecting it onto a digital elevation model (see pdssp:ProductType-DigitalElevationModel, pdssp:Method-Photogrammetry). The USGS Thesaurus only carries \"orthoimagery\" as a synonym -- of \"image collections\" (product types facet) and separately of \"aerial photography\" (methods facet) -- not as its own concept; this PDSSP addition gives it one, narrower than plain Image."@en ;
    skos:inScheme pdssp:ProductTypeScheme ;
    skos:prefLabel "Orthoimage"@en ;
    skos:relatedMatch usgs:image%20collections .

pdssp:ProductType-PointCloud a skos:Concept ;
    skos:definition "An unstructured set of 3D points (e.g. a LiDAR return set or a dense stereo-matching point cloud), before being gridded into a digital elevation model. Not present in the USGS Thesaurus's \"product types\" facet at all -- a PDSSP addition."@en ;
    skos:inScheme pdssp:ProductTypeScheme ;
    skos:prefLabel "Point cloud"@en .

pdssp:ProductType-Image a skos:Concept ;
    skos:definition "A single raster image (e.g. one EDR/RDR observation), not yet mosaicked, ortho-rectified or elevation-derived."@en ;
    skos:inScheme pdssp:ProductTypeScheme ;
    skos:narrower pdssp:ProductType-Anaglyph,
        pdssp:ProductType-ImageMosaic,
        pdssp:ProductType-OrthoImage ;
    skos:prefLabel "Image"@en ;
    skos:relatedMatch usgs:image%20collections .

pdssp:ProductTypeScheme a skos:ConceptScheme ;
    dct:source usgs: ;
    dct:title "PDSSP Product Type"@en ;
    skos:definition "What kind of resource this is (the concrete thing being downloaded), e.g. a digital elevation model, an image mosaic, a point cloud."@en ;
    skos:hasTopConcept pdssp:ProductType-DigitalElevationModel,
        pdssp:ProductType-Image,
        pdssp:ProductType-PointCloud ;
    skos:prefLabel "PDSSP Product Type"@en .