メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((130.0750000 32.4875000, 130.0812500 32.4875000, 130.0812500 32.4916667, 130.0750000 32.4916667, 130.0750000 32.4875000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral