メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.381220464422 44.1766800547347, 142.382697046362 44.1769446682018, 142.383304919175 44.1770508986799, 142.384217047974 44.1772102830865, 142.384036221166 44.1777892164058, 142.383850539023 44.178383658887, 142.38286856556 44.1782270081877, 142.382776450352 44.1779385186349, 142.380475097142 44.1775842088831, 142.37894123983 44.1773296869219, 142.379223904266 44.1763623049945, 142.381220464422 44.1766800547347)) ^^http://www.opengis.net/ont/geosparql#wktLiteral