メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.972956118592 43.5438900469907, 144.972392339997 43.5435254525186, 144.97237441906 43.5435138915002, 144.973231049298 43.5428819450493, 144.973767312363 43.5432323186396, 144.972956118592 43.5438900469907)) ^^http://www.opengis.net/ont/geosparql#wktLiteral