メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.872525959382 43.3442673182679, 141.871023536974 43.3444792306536, 141.870552463652 43.3429654267483, 141.872082450877 43.342708241131, 141.872416902477 43.3438620135755, 141.872525959382 43.3442673182679)) ^^http://www.opengis.net/ont/geosparql#wktLiteral