メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.024942826262 39.3690709910687, 141.020092564095 39.3707703521922, 141.014589520515 39.3726622010053, 141.013618880896 39.3709342624521, 141.015483345124 39.3702802800126, 141.019060660001 39.3690369191146, 141.023937754622 39.3673394478245, 141.024942826262 39.3690709910687)) ^^http://www.opengis.net/ont/geosparql#wktLiteral