メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((132.9625000 34.2125000, 132.9687500 34.2125000, 132.9687500 34.2166667, 132.9625000 34.2166667, 132.9625000 34.2125000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral