メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((132.9812500 32.7458334, 132.9875000 32.7458334, 132.9875000 32.7500000, 132.9812500 32.7500000, 132.9812500 32.7458334)) ^^http://www.opengis.net/ont/geosparql#wktLiteral