メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((133.2187500 33.3125000, 133.2250000 33.3125000, 133.2250000 33.3166667, 133.2187500 33.3166667, 133.2187500 33.3125000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral