メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.413395521886 43.0093251277364, 144.413210691754 43.0094647759892, 144.412904907707 43.0097349178054, 144.411705452316 43.0107537035011, 144.410624559148 43.0116730483152, 144.409718840247 43.0110033136448, 144.410597339321 43.0102530703245, 144.412223098036 43.0088647569385, 144.412420711479 43.0086961046534, 144.413395521886 43.0093251277364)) ^^http://www.opengis.net/ont/geosparql#wktLiteral