メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.900938479893 35.1426890948978, 136.899126154566 35.1433612613105, 136.89912819344 35.1431899938712, 136.899128443713 35.1424000445976, 136.89965897973 35.1423829919117, 136.900002510186 35.1422323480919, 136.900156822592 35.1421774800027, 136.900283112508 35.1421843107866, 136.900493261483 35.1422746414832, 136.900642461909 35.1424672323401, 136.900869984642 35.1423759761213, 136.900938479893 35.1426890948978)) ^^http://www.opengis.net/ont/geosparql#wktLiteral