メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((139.825179374613 38.7428191613961, 139.825043735868 38.7429748000497, 139.824677236643 38.7427657125383, 139.824484195599 38.7426449666846, 139.824663933883 38.7424783081352, 139.824875932598 38.742107121011, 139.824946388776 38.7423115474384, 139.825179374613 38.7428191613961)) ^^http://www.opengis.net/ont/geosparql#wktLiteral