メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.038375863133 42.9165503925606, 143.038437645749 42.9165551722989, 143.039092049925 42.9166061651043, 143.038956695557 42.9176444232899, 143.038948169607 42.9176925192926, 143.038229495229 42.9176376065442, 143.037520689525 42.917583466864, 143.037518294576 42.917583341966, 143.037527217657 42.9175251866382, 143.037669019764 42.9164953246906, 143.038375863133 42.9165503925606)) ^^http://www.opengis.net/ont/geosparql#wktLiteral