メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.059161390265 34.8684900159773, 137.059345931486 34.8684743326996, 137.059401380136 34.8687431374088, 137.05858383701 34.8687901632333, 137.058585763795 34.8685113377696, 137.05858774949 34.8683904844016, 137.058424807422 34.8681702495135, 137.058813374159 34.8679990310925, 137.059161390265 34.8684900159773)) ^^http://www.opengis.net/ont/geosparql#wktLiteral