メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.662016048911 42.1281128098015, 140.661970509924 42.1287646332353, 140.661547220842 42.1287433821583, 140.661590174662 42.1281628363744, 140.662016048911 42.1281128098015)) ^^http://www.opengis.net/ont/geosparql#wktLiteral