メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((134.6625000 35.5083333, 134.6687500 35.5083333, 134.6687500 35.5125000, 134.6625000 35.5125000, 134.6625000 35.5083333)) ^^http://www.opengis.net/ont/geosparql#wktLiteral