メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((133.3125000 33.9791667, 133.3187500 33.9791667, 133.3187500 33.9833333, 133.3125000 33.9833333, 133.3125000 33.9791667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral