メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((132.2062500 34.9291667, 132.2125000 34.9291667, 132.2125000 34.9333333, 132.2062500 34.9333333, 132.2062500 34.9291667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral