メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((134.5312500 33.7291667, 134.5375000 33.7291667, 134.5375000 33.7333333, 134.5312500 33.7333333, 134.5312500 33.7291667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral