メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((145.004309975548 43.5688729866356, 145.004099473937 43.5687360530369, 145.003567668791 43.5683864516556, 145.0042227585 43.5678474530168, 145.004949255337 43.5683054986275, 145.004990691222 43.568331888683, 145.004424477807 43.5687796904616, 145.004346339646 43.5688433496294, 145.004309975548 43.5688729866356)) ^^http://www.opengis.net/ont/geosparql#wktLiteral