メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((130.4812500 33.6416667, 130.4875000 33.6416667, 130.4875000 33.6458334, 130.4812500 33.6458334, 130.4812500 33.6416667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral