メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((133.8062500 34.0250000, 133.8125000 34.0250000, 133.8125000 34.0291667, 133.8062500 34.0291667, 133.8062500 34.0250000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral