メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((130.2687500 33.2416667, 130.2750000 33.2416667, 130.2750000 33.2458334, 130.2687500 33.2458334, 130.2687500 33.2416667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral