メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((139.052897977711 37.9290092495673, 139.053110472712 37.9291067946152, 139.053747641823 37.9293505800167, 139.053518494749 37.92971910411, 139.053489121698 37.9297662625715, 139.05322799208 37.9302436198519, 139.052563541175 37.9300064365633, 139.051988292739 37.9298078254231, 139.051937565626 37.9297920153544, 139.052209970818 37.9293126364634, 139.052467202704 37.9288780993203, 139.052897977711 37.9290092495673)) ^^http://www.opengis.net/ont/geosparql#wktLiteral