メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((132.6437500 34.6208334, 132.6500000 34.6208334, 132.6500000 34.6250000, 132.6437500 34.6250000, 132.6437500 34.6208334)) ^^http://www.opengis.net/ont/geosparql#wktLiteral