メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.271237647352 43.1311911132772, 141.271646510079 43.1314976596869, 141.27208370976 43.1318095812405, 141.271131415441 43.1324858795659, 141.271018994386 43.1325804960556, 141.270877920547 43.1325151498774, 141.270805763522 43.1324817598081, 141.270711396067 43.1324500783307, 141.270462012356 43.1323663638551, 141.270351407802 43.1323292679688, 141.270183517629 43.1322896438172, 141.269823840631 43.1322215113521, 141.269166789978 43.1320805023412, 141.269861750369 43.1315921091529, 141.270843166342 43.1308795589591, 141.271237647352 43.1311911132772)) ^^http://www.opengis.net/ont/geosparql#wktLiteral