メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.364291744434 43.7621587017289, 142.364607239563 43.7627278091131, 142.36489738361 43.7632511750924, 142.363427493158 43.7636846046109, 142.363125424913 43.7631600184893, 142.362803113788 43.7626002654793, 142.362564952378 43.7621866491667, 142.362406579373 43.7618896713619, 142.363859633615 43.7614385055399, 142.363882510873 43.76143144572, 142.364021705079 43.7616715826673, 142.364291744434 43.7621587017289)) ^^http://www.opengis.net/ont/geosparql#wktLiteral