メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.47293332426 43.5865210498867, 142.473505083159 43.5869093898461, 142.473476749431 43.5869319491169, 142.474528857228 43.587654721878, 142.47515903554 43.5880719471291, 142.473997295068 43.5889759315882, 142.473410212833 43.5885578416058, 142.472344335081 43.5878011190496, 142.471800327067 43.5874282615277, 142.471221865756 43.5870314511345, 142.472340229546 43.5861563425331, 142.472366347112 43.5861358969153, 142.47293332426 43.5865210498867)) ^^http://www.opengis.net/ont/geosparql#wktLiteral