メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.86487553782 35.1574880345285, 136.864866888552 35.1579269010799, 136.864467890833 35.1579299913934, 136.863849745598 35.1579356322455, 136.863895686772 35.1575065777545, 136.86388740655 35.1573688056141, 136.863901944737 35.1570666492047, 136.86445096097 35.1570516802618, 136.864866518941 35.1570383481605, 136.86487553782 35.1574880345285)) ^^http://www.opengis.net/ont/geosparql#wktLiteral