メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((134.2312500 34.1333333, 134.2375000 34.1333333, 134.2375000 34.1375000, 134.2312500 34.1375000, 134.2312500 34.1333333)) ^^http://www.opengis.net/ont/geosparql#wktLiteral