メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((133.6375000 33.7750000, 133.6437500 33.7750000, 133.6437500 33.7791667, 133.6375000 33.7791667, 133.6375000 33.7750000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral