メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.357226156671 43.0936883440783, 141.357034389727 43.0944886540571, 141.356475170613 43.0944115017553, 141.35643287168 43.0944034353267, 141.355996602383 43.0943515031119, 141.355458336673 43.0942919495331, 141.355566798327 43.0938491693962, 141.355644872742 43.0934896292158, 141.356115763239 43.0935360674356, 141.356224209176 43.093153274403, 141.3573194311 43.0932925618285, 141.357226156671 43.0936883440783)) ^^http://www.opengis.net/ont/geosparql#wktLiteral