メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((132.6875000 32.8166667, 132.6937500 32.8166667, 132.6937500 32.8208334, 132.6875000 32.8208334, 132.6875000 32.8166667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral