{"@context":{"ns0":"http://rs.tdwg.org/dwc/terms/","rdf":"http://www.w3.org/1999/02/22-rdf-syntax-ns#","owl":"http://www.w3.org/2002/07/owl#","rdfs":"http://www.w3.org/2000/01/rdf-schema#","dct":"http://purl.org/dc/terms/","obo_purl":"http://purl.obolibrary.org/obo/"},"@id":"ns0:verticalDatum","@type":"owl:DatatypeProperty","rdfs:label":"Vertical Datum","rdfs:domain":{"@id":"dct:Location"},"rdfs:isDefinedBy":"http://rs.tdwg.org/dwc/terms/","rdfs:comment":"The vertical datum used as the reference upon which the values in the elevation terms are based.","obo_purl:IAO_0000112":"`EGM84`, `EGM96`, `EGM2008`, `PGM2000A`, `PGM2004`, `PGM2006`, `PGM2007`, `epsg:7030`, `unknown`","dcterms:description":"Recommended best practice is to use a controlled vocabulary."}