メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.353734361704 43.7684608237531, 142.354012453849 43.7689876044916, 142.352498847729 43.7694402946963, 142.352187767201 43.7689002302969, 142.352178082513 43.7688834322729, 142.351873342585 43.7683546492775, 142.353429611848 43.7679119852507, 142.353728616835 43.768449946744, 142.353734361704 43.7684608237531)) ^^http://www.opengis.net/ont/geosparql#wktLiteral