メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.86988852962 43.3356650860342, 141.870050195191 43.3362352724635, 141.867444991558 43.3366518173562, 141.866254234531 43.3368421551342, 141.866065982545 43.3362244064721, 141.865940572574 43.3358070888594, 141.86593355019 43.3357901869017, 141.865914571976 43.3357284467674, 141.866416578918 43.3358544637001, 141.86739604751 43.3357115917017, 141.868163377327 43.3355996522178, 141.868206378301 43.3353189061626, 141.869781982735 43.3353123903488, 141.86987670224 43.3356383218682, 141.86988852962 43.3356650860342)) ^^http://www.opengis.net/ont/geosparql#wktLiteral