メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.398030419881 44.1738049922168, 142.397637928718 44.1737425122919, 142.396191314479 44.1735121617667, 142.396182558548 44.1735072676324, 142.396447754766 44.172502263192, 142.398343128505 44.1727902545343, 142.398030419881 44.1738049922168)) ^^http://www.opengis.net/ont/geosparql#wktLiteral