メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.980817197093 43.5479365086061, 144.980556024082 43.5481642900441, 144.980158276582 43.5485104821245, 144.97934598023 43.5479925197847, 144.979351378405 43.5479879255166, 144.9797458892 43.5476770426228, 144.980088610722 43.5474139121276, 144.980844702682 43.5479119062634, 144.980817197093 43.5479365086061)) ^^http://www.opengis.net/ont/geosparql#wktLiteral