メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.374345070236 43.7611952810787, 142.374652653527 43.7617539869371, 142.373171375515 43.7621921520717, 142.372829230647 43.7616188507076, 142.372523629582 43.7610543181537, 142.373981098275 43.7606262256022, 142.374077588529 43.7607605412476, 142.374175319839 43.7609016768712, 142.374281255859 43.7610869308732, 142.374345070236 43.7611952810787)) ^^http://www.opengis.net/ont/geosparql#wktLiteral