メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.311008976899 43.7798044784306, 142.311797850605 43.7792947890835, 142.311931072843 43.7800057034265, 142.311958084679 43.780106177776, 142.312145427864 43.7810930568701, 142.312176617807 43.7812205332498, 142.312218247984 43.7814484928416, 142.312257913975 43.7817589769366, 142.31218378572 43.7821459954615, 142.312138448685 43.7823590232123, 142.311973164727 43.7826861080029, 142.311669478411 43.7831069336963, 142.311069163078 43.7825052498041, 142.309938483118 43.7813838292031, 142.309248993255 43.7806896923739, 142.311008976899 43.7798044784306)) ^^http://www.opengis.net/ont/geosparql#wktLiteral