メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((133.1625000 33.8750000, 133.1687500 33.8750000, 133.1687500 33.8791667, 133.1625000 33.8791667, 133.1625000 33.8750000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral