メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((131.648420559245 32.4680171786432, 131.647136746936 32.468269258639, 131.646306132226 32.4681204549186, 131.645736766233 32.4672307805733, 131.64686543706 32.4668033611855, 131.648040516589 32.4667593959507, 131.648147849151 32.4675254294055, 131.648410834252 32.4679996853842, 131.648420559245 32.4680171786432)) ^^http://www.opengis.net/ont/geosparql#wktLiteral