メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.353303588164 43.0556805705079, 141.353190553516 43.056132045649, 141.351639936918 43.0559216190174, 141.35174486355 43.055454749276, 141.351924692107 43.0547642574146, 141.351938320883 43.0547306763254, 141.35349650881 43.0549328588323, 141.353303588164 43.0556805705079)) ^^http://www.opengis.net/ont/geosparql#wktLiteral