@prefix dct: <http://purl.org/dc/terms/> .
@prefix iau2015: <http://www.opengis.net/def/crs/IAU/2015/> .
@prefix pdssp: <https://pdssp.github.io/pdssp-ontology/vocab#> .
@prefix skos: <http://www.w3.org/2004/02/skos/core#> .

pdssp:Crs-IAU2015-49900 a skos:Concept ;
    skos:definition "Mars geographic CRS on a sphere of the IAU 2015 semi-major radius (3396.19 km), longitude positive east."@en ;
    skos:exactMatch iau2015:49900 ;
    skos:inScheme pdssp:CrsScheme ;
    skos:notation "IAU_2015:49900" ;
    skos:prefLabel "Mars (2015) - Sphere"@en ;
    skos:topConceptOf pdssp:CrsScheme ;
    pdssp:referenceBody pdssp:Target-Mars .

pdssp:Crs-IAU2015-49901 a skos:Concept ;
    skos:definition "Mars planetographic CRS on the IAU 2015 ellipsoid: planetographic latitude, longitude positive west."@en ;
    skos:exactMatch iau2015:49901 ;
    skos:inScheme pdssp:CrsScheme ;
    skos:notation "IAU_2015:49901" ;
    skos:prefLabel "Mars (2015) / Ographic"@en ;
    skos:topConceptOf pdssp:CrsScheme ;
    pdssp:referenceBody pdssp:Target-Mars .

pdssp:Crs-IAU2015-49902 a skos:Concept ;
    skos:definition "Mars planetocentric CRS on the IAU 2015 ellipsoid: planetocentric latitude, longitude positive east."@en ;
    skos:exactMatch iau2015:49902 ;
    skos:inScheme pdssp:CrsScheme ;
    skos:notation "IAU_2015:49902" ;
    skos:prefLabel "Mars (2015) / Ocentric"@en ;
    skos:topConceptOf pdssp:CrsScheme ;
    pdssp:referenceBody pdssp:Target-Mars .

pdssp:CrsScheme a skos:ConceptScheme ;
    dct:source iau2015:,
        <https://doi.org/10.1007/s10569-017-9805-5> ;
    dct:title "PDSSP Coordinate Reference System"@en ;
    skos:definition "IAU 2015 planetary coordinate reference systems. The notation is the value written in proj:code."@en ;
    skos:hasTopConcept pdssp:Crs-IAU2015-49900,
        pdssp:Crs-IAU2015-49901,
        pdssp:Crs-IAU2015-49902 ;
    skos:prefLabel "PDSSP Coordinate Reference System"@en .