メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.306629005791 43.0934618231158, 141.306158352182 43.0937334209977, 141.305571482589 43.0940985088179, 141.304587876155 43.093203896751, 141.305006453552 43.0929616236029, 141.305138474289 43.0928808945203, 141.305202430522 43.0928417836106, 141.305264562781 43.0928076951736, 141.306129876862 43.092300801127, 141.307080330175 43.0931989257451, 141.306629005791 43.0934618231158)) ^^http://www.opengis.net/ont/geosparql#wktLiteral