メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.106645863954 43.8208677130527, 144.10598639833 43.8210363927653, 144.105507215178 43.8211747853819, 144.105032037344 43.8202826088779, 144.104843540362 43.8199287467122, 144.104814251092 43.8198736518454, 144.105224766611 43.8197448542642, 144.105838800446 43.8195520758127, 144.106385716163 43.8205275003368, 144.106453018341 43.8205118143977, 144.106639234491 43.8204722374876, 144.106634501077 43.8205388016009, 144.106619113856 43.8207567437117, 144.106645863954 43.8208677130527)) ^^http://www.opengis.net/ont/geosparql#wktLiteral