メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.375871106389 43.7607406831796, 142.376177022158 43.7613134703495, 142.374652653527 43.7617539869371, 142.374345070236 43.7611952810787, 142.374281255859 43.7610869308732, 142.374175319839 43.7609016768712, 142.374077588529 43.7607605412476, 142.373981098275 43.7606262256022, 142.375027435777 43.7603228195137, 142.3755658006 43.7601742430502, 142.375871106389 43.7607406831796)) ^^http://www.opengis.net/ont/geosparql#wktLiteral