メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.606085151977 43.2967352614013, 144.605979748651 43.2966785729868, 144.605796419323 43.296917443304, 144.603751409861 43.2957551443067, 144.604299027189 43.2949220660419, 144.606712644651 43.2959665584056, 144.606587853133 43.2961256011313, 144.606085151977 43.2967352614013)) ^^http://www.opengis.net/ont/geosparql#wktLiteral