メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.0687500 43.2125000, 144.0750000 43.2125000, 144.0750000 43.2166667, 144.0687500 43.2166667, 144.0687500 43.2125000)) ^^http://www.opengis.net/ont/geosparql#wktLiteral