メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((134.0687500 35.2083333, 134.0750000 35.2083333, 134.0750000 35.2125000, 134.0687500 35.2125000, 134.0687500 35.2083333)) ^^http://www.opengis.net/ont/geosparql#wktLiteral