メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.058909084662 42.9104019418424, 143.056821937035 42.9103001187275, 143.056718224551 42.9102929718088, 143.056724924773 42.9102346885691, 143.056876508722 42.9094010204089, 143.056887487679 42.9093406679317, 143.056964876496 42.9089144688021, 143.057449066535 42.9089558589164, 143.05749712956 42.9089582632705, 143.059089581335 42.9090894520389, 143.058921515121 42.9103283559455, 143.058909084662 42.9104019418424)) ^^http://www.opengis.net/ont/geosparql#wktLiteral