メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((133.6812500 35.1333333, 133.6875000 35.1333333, 133.6875000 35.1375000, 133.6812500 35.1375000, 133.6812500 35.1333333)) ^^http://www.opengis.net/ont/geosparql#wktLiteral