メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((133.1375000 33.1291667, 133.1437500 33.1291667, 133.1437500 33.1333333, 133.1375000 33.1333333, 133.1375000 33.1291667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral