メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.360508763697 43.0632493774439, 141.360788606849 43.0632858737164, 141.361451846687 43.0633745055966, 141.36117752937 43.0645226181142, 141.360480989922 43.064434148143, 141.359697899995 43.0643213690281, 141.359992834435 43.0631821406315, 141.360150321339 43.0632027054863, 141.360508763697 43.0632493774439)) ^^http://www.opengis.net/ont/geosparql#wktLiteral