メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.105833572787 43.8235883359666, 144.104402979784 43.824010613543, 144.103805301 43.8229829314457, 144.105178090934 43.8225639551907, 144.105230047008 43.8225480972588, 144.105554282373 43.8231071074272, 144.105833572787 43.8235883359666)) ^^http://www.opengis.net/ont/geosparql#wktLiteral