メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.531453526435 44.0762768418907, 143.531410015976 44.0762900389687, 143.529950962209 44.0767536811407, 143.529847593641 44.076786534388, 143.529818996657 44.0767948366016, 143.529728945915 44.0768210276176, 143.526675126491 44.0777639796742, 143.526581867757 44.0777908017371, 143.526165591222 44.0779104676486, 143.52606404175 44.0761494438539, 143.527620567442 44.0756455684483, 143.528844814648 44.0752442073284, 143.528959442176 44.0752089067522, 143.530470900384 44.0747433451425, 143.530501991845 44.0747332416617, 143.531453526435 44.0762768418907)) ^^http://www.opengis.net/ont/geosparql#wktLiteral