メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.619785589625 42.8629992082617, 141.620017979219 42.8633496827381, 141.618368405594 42.8639664232908, 141.617098096535 42.864441340248, 141.616979887229 42.8642617123907, 141.616379228275 42.8633489572189, 141.616067371297 42.8628750495855, 141.61774105593 42.8622712985442, 141.619001460326 42.8618166070677, 141.61931057344 42.8622828088378, 141.619545644346 42.8626373367542, 141.619785589625 42.8629992082617)) ^^http://www.opengis.net/ont/geosparql#wktLiteral