メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((130.9750000 34.1166667, 130.9812500 34.1166667, 130.9812500 34.1208334, 130.9750000 34.1208334, 130.9750000 34.1166667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral