メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.350234350145 43.0761830681267, 141.35132620981 43.0763415996993, 141.351281502921 43.0765322821529, 141.351243011458 43.0766964561755, 141.351191559149 43.0769159050443, 141.351051435594 43.0774902378777, 141.349462900172 43.0772644957595, 141.349636676713 43.0766991512416, 141.349756567845 43.0761248011273, 141.350234350145 43.0761830681267)) ^^http://www.opengis.net/ont/geosparql#wktLiteral