メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((139.356930667689 34.7307766870876, 139.356925177184 34.7306115808737, 139.356926737861 34.7303400141382, 139.357237507973 34.7302085417363, 139.357424305613 34.7301768753097, 139.357792208504 34.7302355004259, 139.357647872375 34.7305611620708, 139.356930667689 34.7307766870876)) ^^http://www.opengis.net/ont/geosparql#wktLiteral