メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.607080757468 35.3452822684241, 136.606755192775 35.3452879364616, 136.60640581055 35.3452887737849, 136.60600627243 35.3453277574749, 136.606011739602 35.3450893308436, 136.6070840912 35.3450975651228, 136.607080757468 35.3452822684241)) ^^http://www.opengis.net/ont/geosparql#wktLiteral