メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((130.8500000 30.7416667, 130.8562500 30.7416667, 130.8562500 30.7458334, 130.8500000 30.7458334, 130.8500000 30.7416667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral