メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((132.8625000 33.6833333, 132.8687500 33.6833333, 132.8687500 33.6875000, 132.8625000 33.6875000, 132.8625000 33.6833333)) ^^http://www.opengis.net/ont/geosparql#wktLiteral