メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((134.6062500 34.1458334, 134.6125000 34.1458334, 134.6125000 34.1500000, 134.6062500 34.1500000, 134.6062500 34.1458334)) ^^http://www.opengis.net/ont/geosparql#wktLiteral