メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((130.1500000 32.6291667, 130.1562500 32.6291667, 130.1562500 32.6333333, 130.1500000 32.6333333, 130.1500000 32.6291667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral