メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((134.9500000 34.9958334, 134.9562500 34.9958334, 134.9562500 35.0000000, 134.9500000 35.0000000, 134.9500000 34.9958334)) ^^http://www.opengis.net/ont/geosparql#wktLiteral