メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.324786339782 43.7620300122103, 142.325411113211 43.7622316874527, 142.325428949186 43.7622370556701, 142.324761170432 43.7633380789488, 142.324123037425 43.7631432121458, 142.323647410594 43.7629970926024, 142.32333430689 43.7629054021238, 142.323974850216 43.7617766617794, 142.324168504979 43.7618400016485, 142.324786339782 43.7620300122103)) ^^http://www.opengis.net/ont/geosparql#wktLiteral