メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.37327931953 43.8253018230783, 142.372013007021 43.8244263987553, 142.372620061756 43.8239855981729, 142.374045340337 43.8229294892593, 142.375258164009 43.8238084840085, 142.37327931953 43.8253018230783)) ^^http://www.opengis.net/ont/geosparql#wktLiteral