メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.904357975315 43.482191356009, 141.904538687591 43.4827521755097, 141.903767055828 43.4828780216442, 141.903732205732 43.4828836831054, 141.903580022652 43.4823172871367, 141.903524018099 43.4821435564439, 141.902743579797 43.4822525271479, 141.902696307883 43.4821138790101, 141.902603903944 43.4817672500242, 141.903394780929 43.4816432629745, 141.904159727459 43.4815229200427, 141.904357975315 43.482191356009)) ^^http://www.opengis.net/ont/geosparql#wktLiteral