メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.605945409812 43.2871538036411, 144.603687724728 43.2878354844291, 144.603196756367 43.2870069840397, 144.602762287018 43.286265293993, 144.602861912473 43.2861277993877, 144.602721058789 43.2857655081744, 144.60287730241 43.2858181284771, 144.604975595225 43.2853529687525, 144.605945409812 43.2871538036411)) ^^http://www.opengis.net/ont/geosparql#wktLiteral