メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((130.1562500 33.1458334, 130.1625000 33.1458334, 130.1625000 33.1500000, 130.1562500 33.1500000, 130.1562500 33.1458334)) ^^http://www.opengis.net/ont/geosparql#wktLiteral