メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.372851738089 43.7758998547675, 142.37204034327 43.7761335105509, 142.371231436515 43.7763769511027, 142.371095797821 43.7761373128123, 142.370729260567 43.775481399626, 142.370929834718 43.7754115548426, 142.371262029899 43.7753020515438, 142.371412527633 43.77523790111, 142.371507514733 43.7752033613221, 142.371900415894 43.7750604945221, 142.372242903076 43.7749058311977, 142.372276371682 43.7748884614266, 142.372851738089 43.7758998547675)) ^^http://www.opengis.net/ont/geosparql#wktLiteral