メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.332706308444 43.0606470508703, 141.332580817435 43.0611444680839, 141.332424094114 43.0618257562719, 141.33165078559 43.0617188361782, 141.331453205737 43.0616927038116, 141.331111173073 43.0616475473344, 141.330842469429 43.0616120508191, 141.331004687818 43.0610134464455, 141.331150430295 43.0604325730123, 141.331597210526 43.0604958015884, 141.332706308444 43.0606470508703)) ^^http://www.opengis.net/ont/geosparql#wktLiteral