メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.35022539852 44.4798630833236, 142.349358615505 44.479684125891, 142.349329511036 44.4796781032974, 142.349748974162 44.4786816853787, 142.350689946384 44.4789000209436, 142.35022539852 44.4798630833236)) ^^http://www.opengis.net/ont/geosparql#wktLiteral