メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.327428876209 43.0988587355699, 141.327059047323 43.0990277017146, 141.326689047152 43.0992078466477, 141.326161119518 43.0994358735338, 141.32584700629 43.0990778243015, 141.325641995639 43.0988427799323, 141.325491228123 43.0986699260753, 141.32601188623 43.0984398746815, 141.326386745787 43.0982746100785, 141.326417469564 43.0982674038548, 141.326769474614 43.0980964674116, 141.327428876209 43.0988587355699)) ^^http://www.opengis.net/ont/geosparql#wktLiteral