メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.442993888128 43.8120086391403, 142.443518071144 43.8123313670131, 142.444046283898 43.8126591667634, 142.444578025563 43.8129847429746, 142.444317351106 43.813209296929, 142.443498952213 43.8138851975262, 142.442974518088 43.8135498829038, 142.442434475201 43.8132237327186, 142.44191887509 43.8128873255753, 142.441897965336 43.8128733146123, 142.441405137558 43.8125694253985, 142.442419900722 43.8116844454906, 142.442636164345 43.8118034687648, 142.442993888128 43.8120086391403)) ^^http://www.opengis.net/ont/geosparql#wktLiteral