メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.857816567236 35.2448974148292, 136.856903600203 35.2448968327912, 136.856493121935 35.2448981011927, 136.856507579827 35.2443800325967, 136.856536632705 35.2430591011147, 136.857825999989 35.2430785378736, 136.859187901307 35.2430808927153, 136.859160380989 35.2449076812563, 136.857826805514 35.2448974410597, 136.857816567236 35.2448974148292)) ^^http://www.opengis.net/ont/geosparql#wktLiteral