メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.8200173036 35.392158395357, 136.819699808536 35.3920898161595, 136.819812159033 35.3917898643335, 136.820144591526 35.3917131382054, 136.820154859211 35.3917101388214, 136.8200173036 35.392158395357)) ^^http://www.opengis.net/ont/geosparql#wktLiteral