メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.782959176783 35.4491806619151, 136.780035424796 35.4494394564846, 136.780030232415 35.4493376811404, 136.78002380562 35.4489083035316, 136.782888888869 35.448658793278, 136.782921070861 35.4488977336911, 136.782959176783 35.4491806619151)) ^^http://www.opengis.net/ont/geosparql#wktLiteral