メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((130.4875000 33.6708334, 130.4937500 33.6708334, 130.4937500 33.6750000, 130.4875000 33.6750000, 130.4875000 33.6708334)) ^^http://www.opengis.net/ont/geosparql#wktLiteral