メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.4739924512 44.0412335247063, 143.468375709088 44.0495206214813, 143.473116457622 44.0565351692734, 143.473256718542 44.0641759068305, 143.456055681883 44.0664260368985, 143.440845399285 44.0620282974905, 143.434876260672 44.0374613317717, 143.46585681299 44.0334220819984, 143.47413035451 44.0410047508791, 143.4739924512 44.0412335247063)) ^^http://www.opengis.net/ont/geosparql#wktLiteral