メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((132.9812500 33.1291667, 132.9875000 33.1291667, 132.9875000 33.1333333, 132.9812500 33.1333333, 132.9812500 33.1291667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral