メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.625149834346 35.3582970084917, 136.624054949621 35.3582958285431, 136.624027361649 35.3579350016406, 136.625103733972 35.3579456761398, 136.625149834346 35.3582970084917)) ^^http://www.opengis.net/ont/geosparql#wktLiteral