メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.406962752101 43.7579735245512, 142.407689987273 43.7579459520536, 142.40778363298 43.7588572274617, 142.407069051743 43.758885962558, 142.407051894326 43.7588868995221, 142.405419083332 43.7589767826432, 142.40513796706 43.7589860215205, 142.403732458365 43.7590765065102, 142.403682285924 43.7585804017331, 142.403626072766 43.7581109033882, 142.404261721801 43.758114486245, 142.405325031632 43.7580598969985, 142.406962752101 43.7579735245512)) ^^http://www.opengis.net/ont/geosparql#wktLiteral