メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((130.5062500 32.1500000, 130.5125000 32.1500000, 130.5125000 32.1541667, 130.5062500 32.1541667, 130.5062500 32.1500000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral