メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((130.3500000 32.0416667, 130.3562500 32.0416667, 130.3562500 32.0458334, 130.3500000 32.0458334, 130.3500000 32.0416667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral