メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((130.0187500 32.8541667, 130.0250000 32.8541667, 130.0250000 32.8583333, 130.0187500 32.8583333, 130.0187500 32.8541667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral