メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((134.5687500 35.4125000, 134.5750000 35.4125000, 134.5750000 35.4166667, 134.5687500 35.4166667, 134.5687500 35.4125000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral