メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.046099542646 42.9156678367615, 143.046865740178 42.9157291169215, 143.04665621959 42.9170909357011, 143.046651891991 42.917118958165, 143.046648411457 42.9171459898666, 143.045911848085 42.9170726859546, 143.045118849299 42.9169937867933, 143.045325712878 42.9156160249705, 143.046099542646 42.9156678367615)) ^^http://www.opengis.net/ont/geosparql#wktLiteral