メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.452902882082 43.8158536160608, 142.452481107287 43.816200797747, 142.452059860433 43.8165475386823, 142.45191459542 43.8164598079522, 142.451298174831 43.8160808174569, 142.451013016165 43.8158909462956, 142.449975063861 43.8152359113985, 142.44947604158 43.8149413524723, 142.450837506497 43.8138243512762, 142.451137581981 43.8140213517527, 142.451321557122 43.8141364404354, 142.452347721745 43.8147748189277, 142.453408999222 43.8154370162857, 142.452902882082 43.8158536160608)) ^^http://www.opengis.net/ont/geosparql#wktLiteral