メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((133.3437500 33.4541667, 133.3500000 33.4541667, 133.3500000 33.4583333, 133.3437500 33.4583333, 133.3437500 33.4541667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral