メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((133.4875000 34.6291667, 133.4937500 34.6291667, 133.4937500 34.6333333, 133.4875000 34.6333333, 133.4875000 34.6291667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral