メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.32744947125 43.7564978275953, 142.326758116901 43.7575376730244, 142.326742684684 43.7575329370707, 142.326370921252 43.7574192132544, 142.325784112594 43.7572424624945, 142.32626404999 43.7569242573928, 142.326468710297 43.7567426217906, 142.326764220119 43.7564069223755, 142.327332708823 43.7559225203263, 142.327411968797 43.7559381306238, 142.327514875003 43.7559553955023, 142.327511710992 43.7561707914813, 142.327505692117 43.7563660773041, 142.32744947125 43.7564978275953)) ^^http://www.opengis.net/ont/geosparql#wktLiteral