メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.339800149696 43.7564156517965, 142.340547668214 43.7566387977475, 142.342334215765 43.7571917406795, 142.341646227338 43.7582690227034, 142.339893249117 43.7577243924366, 142.339184487018 43.7574984517372, 142.338425050802 43.757290338034, 142.339056577713 43.7561952945075, 142.339800149696 43.7564156517965)) ^^http://www.opengis.net/ont/geosparql#wktLiteral