メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((131.179009872788 33.9766365244377, 131.179093401383 33.9776961155231, 131.178552157388 33.9777378379172, 131.177963912639 33.9777934081784, 131.177413983315 33.9778329425267, 131.17632323265 33.9779285586637, 131.176244676689 33.9768806986591, 131.176174757719 33.9759119358745, 131.176165289173 33.9758973498548, 131.177214111574 33.9758061869464, 131.178373454692 33.9756984342772, 131.17888675565 33.9756521220169, 131.179009872788 33.9766365244377)) ^^http://www.opengis.net/ont/geosparql#wktLiteral