メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.917042867866 43.5851352467062, 141.916564541041 43.5841249845153, 141.918015556294 43.5837523475286, 141.919234926828 43.5834427685569, 141.920771052917 43.5830549059155, 141.921098876685 43.5837369611968, 141.921254779587 43.5840612983088, 141.921270532356 43.5840999880137, 141.919718398825 43.584487846086, 141.917383668677 43.585047350708, 141.917042867866 43.5851352467062)) ^^http://www.opengis.net/ont/geosparql#wktLiteral