メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.913070833318 43.4999454769869, 141.911588169785 43.5001882536892, 141.91134987044 43.499434527037, 141.911221773267 43.4990040660023, 141.912756690589 43.4988055422176, 141.912866721541 43.4991990977672, 141.912908939051 43.4993501077238, 141.912984039864 43.4996501313452, 141.913070833318 43.4999454769869)) ^^http://www.opengis.net/ont/geosparql#wktLiteral