メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.055751602713 42.9124244490922, 143.056442434413 42.9124759246622, 143.056291347567 42.9135543396161, 143.055616947843 42.9135017624291, 143.055616030017 42.9135194921851, 143.054855708028 42.9134743367622, 143.054779084202 42.9134684750785, 143.054893401904 42.9123639463455, 143.055003049726 42.9123710532055, 143.055012532601 42.9123716905746, 143.055751602713 42.9124244490922)) ^^http://www.opengis.net/ont/geosparql#wktLiteral