メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((132.4875000 33.6083333, 132.4937500 33.6083333, 132.4937500 33.6125000, 132.4875000 33.6125000, 132.4875000 33.6083333)) ^^http://www.opengis.net/ont/geosparql#wktLiteral