メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((127.8750000 26.3333333, 127.8812500 26.3333333, 127.8812500 26.3375000, 127.8750000 26.3375000, 127.8750000 26.3333333)) ^^http://www.opengis.net/ont/geosparql#wktLiteral