メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.965808022938 43.5503191122055, 144.96562246573 43.5501873516347, 144.965248072564 43.5499540744544, 144.9660570312 43.5492946303319, 144.966399380447 43.5495463164069, 144.966861775941 43.5498359686361, 144.965808022938 43.5503191122055)) ^^http://www.opengis.net/ont/geosparql#wktLiteral