メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((132.7937500 34.4541667, 132.8000000 34.4541667, 132.8000000 34.4583333, 132.7937500 34.4583333, 132.7937500 34.4541667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral