メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((138.957101666719 37.2348837796673, 138.956962321401 37.2348674234199, 138.956335577803 37.2347183469349, 138.956158045478 37.2347426880556, 138.95504461766 37.2344532788294, 138.955371358484 37.2336784577645, 138.956059268035 37.2338398343982, 138.956617584544 37.2339589033072, 138.956800647886 37.2339904387296, 138.957032578218 37.2339858801632, 138.957106221216 37.2339774270764, 138.957101666719 37.2348837796673)) ^^http://www.opengis.net/ont/geosparql#wktLiteral