メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.387185281898 42.9889382214214, 144.387245916898 42.9887475519308, 144.387430090206 42.9881692423358, 144.387507653041 42.9879253687933, 144.388276022999 42.9882156579911, 144.388301116936 42.9886019968208, 144.388138625345 42.9886509609863, 144.387185281898 42.9889382214214)) ^^http://www.opengis.net/ont/geosparql#wktLiteral