メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((130.3875000 33.1666667, 130.3937500 33.1666667, 130.3937500 33.1708334, 130.3875000 33.1708334, 130.3875000 33.1666667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral