メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.29162661787 43.0721142339861, 141.291135501635 43.0723754024572, 141.290677752927 43.0726188434465, 141.290246504675 43.0728606072568, 141.290151370815 43.0729138924961, 141.289802495391 43.0731084505424, 141.289052361657 43.0725212362945, 141.289518065823 43.0722724527201, 141.28997200722 43.0720272253489, 141.290417464697 43.0717905059678, 141.290896717725 43.071527202207, 141.29162661787 43.0721142339861)) ^^http://www.opengis.net/ont/geosparql#wktLiteral