メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((130.5812500 32.3291667, 130.5875000 32.3291667, 130.5875000 32.3333333, 130.5812500 32.3333333, 130.5812500 32.3291667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral