メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.83749962083 43.0811604700002, 142.838171842578 43.0813121585049, 142.838251892766 43.0813301729283, 142.837816157725 43.0823901114805, 142.837733661647 43.0823720391642, 142.83704685215 43.0822212678341, 142.836473170014 43.0820953706509, 142.836476869986 43.0820859271803, 142.836868497236 43.0811221505113, 142.836907260294 43.0810267938021, 142.83749962083 43.0811604700002)) ^^http://www.opengis.net/ont/geosparql#wktLiteral