メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((131.649184516929 32.4691034410659, 131.647800699437 32.4695573942866, 131.647136746936 32.468269258639, 131.648420559245 32.4680171786432, 131.649184516929 32.4691034410659)) ^^http://www.opengis.net/ont/geosparql#wktLiteral