メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((132.4625000 34.4125000, 132.4687500 34.4125000, 132.4687500 34.4166667, 132.4625000 34.4166667, 132.4625000 34.4125000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral