メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((132.8812500 33.8875000, 132.8875000 33.8875000, 132.8875000 33.8916667, 132.8812500 33.8916667, 132.8812500 33.8875000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral