メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.455610123578 43.04428779292, 144.454964054935 43.0444584889299, 144.454933585644 43.0443841784821, 144.454028164977 43.0420481446988, 144.454591588541 43.0419208916074, 144.455610123578 43.04428779292)) ^^http://www.opengis.net/ont/geosparql#wktLiteral