メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.880683539565 43.0134879676639, 142.880676257835 43.0134834364151, 142.879706762883 43.0129319672547, 142.879721093283 43.0128854005727, 142.87986927884 43.0124046597097, 142.880087016966 43.0117019286959, 142.880558357529 43.0120123032307, 142.88158750383 43.0126901005573, 142.880683539565 43.0134879676639)) ^^http://www.opengis.net/ont/geosparql#wktLiteral