メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((137.001249725853 34.8920537400246, 136.998895722761 34.8929428983536, 136.998815255447 34.8924604914792, 136.998705580934 34.8919024036867, 136.998504739249 34.89100317237, 136.99987238091 34.8914295418907, 137.001301726704 34.8919047851011, 137.001249725853 34.8920537400246)) ^^http://www.opengis.net/ont/geosparql#wktLiteral