メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((132.7625000 35.2458334, 132.7687500 35.2458334, 132.7687500 35.2500000, 132.7625000 35.2500000, 132.7625000 35.2458334)) ^^http://www.opengis.net/ont/geosparql#wktLiteral