メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.348924632867 43.7539176972698, 142.348147251686 43.7544942349789, 142.347329698391 43.7551194295386, 142.344660550367 43.7532742269652, 142.345253100184 43.7525704812619, 142.345319274796 43.7524840011947, 142.345677547102 43.7520158670626, 142.345820229133 43.7518294293087, 142.348924632867 43.7539176972698)) ^^http://www.opengis.net/ont/geosparql#wktLiteral