メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.767970351071 43.1978511157834, 141.767300614541 43.197516555095, 141.767045821167 43.1973893117756, 141.767372952073 43.1970517802423, 141.766997320303 43.1968583404243, 141.767277259268 43.1965810934925, 141.767673274105 43.1965902880861, 141.767822091521 43.1965883829701, 141.768424487362 43.1959667583035, 141.768675644055 43.1961161372457, 141.769326240567 43.1964450527808, 141.768599504479 43.1971897969332, 141.767970351071 43.1978511157834)) ^^http://www.opengis.net/ont/geosparql#wktLiteral