メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.743750573233 35.4142053503834, 136.74364579364 35.4144129362632, 136.742371450697 35.4139872832315, 136.742414347063 35.4139101120139, 136.742476651321 35.4137733975344, 136.743750573233 35.4142053503834)) ^^http://www.opengis.net/ont/geosparql#wktLiteral