メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((134.6500000 33.8791667, 134.6562500 33.8791667, 134.6562500 33.8833333, 134.6500000 33.8833333, 134.6500000 33.8791667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral