メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.334081587643 43.0615984220718, 141.334079646527 43.0616054354058, 141.333961017622 43.0620340877164, 141.332918472012 43.0618883068992, 141.332424094114 43.0618257562719, 141.332580817435 43.0611444680839, 141.332706308444 43.0606470508703, 141.33394129609 43.0608081590543, 141.334263400689 43.0608644012107, 141.334128888175 43.0614275061362, 141.334081587643 43.0615984220718)) ^^http://www.opengis.net/ont/geosparql#wktLiteral