メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.348820752976 44.4866310668299, 142.347963492932 44.4864587323818, 142.347940307072 44.4864528464845, 142.348010365127 44.4862265191753, 142.348387198213 44.4854904804934, 142.348485765424 44.4855210171359, 142.348503773187 44.4855265906057, 142.349256359349 44.4857123018035, 142.348820752976 44.4866310668299)) ^^http://www.opengis.net/ont/geosparql#wktLiteral