メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((139.688761608446 36.7332939848873, 139.688636625761 36.7334062756382, 139.688500099948 36.7334683506548, 139.688309108519 36.7334754426891, 139.688144160838 36.7334636944323, 139.688271154846 36.7332710734906, 139.688352211078 36.7330920538987, 139.688373123785 36.7329708360689, 139.688536255495 36.7331343097404, 139.688721093208 36.7332740099246, 139.688761608446 36.7332939848873)) ^^http://www.opengis.net/ont/geosparql#wktLiteral