メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.619256352565 43.3040595296182, 144.613085093076 43.3054968603838, 144.612452165883 43.3040291461133, 144.612205438244 43.303457031464, 144.612439200585 43.3033916508147, 144.612494691816 43.3033774238152, 144.618200550076 43.3024124989338, 144.61870755774 43.3028967873311, 144.619256352565 43.3040595296182)) ^^http://www.opengis.net/ont/geosparql#wktLiteral