メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((131.3437500 34.4125000, 131.3500000 34.4125000, 131.3500000 34.4166667, 131.3437500 34.4166667, 131.3437500 34.4125000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral