メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((134.8500000 34.4166667, 134.8562500 34.4166667, 134.8562500 34.4208334, 134.8500000 34.4208334, 134.8500000 34.4166667)) ^^http://www.opengis.net/ont/geosparql#wktLiteral