メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.903913131788 43.4885856183963, 141.903831379147 43.48867275294, 141.903769249446 43.4887063573431, 141.903672397408 43.4887229787344, 141.903591104648 43.4887255466299, 141.903525371026 43.4887140961738, 141.903483026807 43.4886745155764, 141.903448547435 43.48861523227, 141.903173192969 43.4886377840904, 141.903260570705 43.4883116644498, 141.903146283285 43.4869581042961, 141.903506574742 43.4869316230974, 141.903496172628 43.4870570185167, 141.903767696447 43.487966626613, 141.903913131788 43.4885856183963)) ^^http://www.opengis.net/ont/geosparql#wktLiteral