メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.408195492868 40.4791386187302, 141.405692565125 40.4806222188985, 141.403330236413 40.4798433468468, 141.405106013146 40.4789931729635, 141.405758765854 40.4786657091292, 141.406327122124 40.478398889317, 141.406782894073 40.4781015625009, 141.406827061473 40.4781323386037, 141.407848861831 40.4788217136057, 141.408195492868 40.4791386187302)) ^^http://www.opengis.net/ont/geosparql#wktLiteral