メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((130.7937500 33.5375000, 130.8000000 33.5375000, 130.8000000 33.5416667, 130.7937500 33.5416667, 130.7937500 33.5375000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral