メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.953899277159 37.7907471591032, 140.952961273324 37.7907120088906, 140.952812478547 37.7905149163001, 140.952789807985 37.7903939181926, 140.952830154937 37.790310893917, 140.953219212859 37.7903181791952, 140.953899277159 37.7907471591032)) ^^http://www.opengis.net/ont/geosparql#wktLiteral