メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.382374385567 43.0783926290689, 141.382100373167 43.0785010393838, 141.38140177396 43.0787881712469, 141.380639721135 43.0791044259353, 141.3802074292 43.0785407620254, 141.37985714365 43.0780739999073, 141.381305616465 43.0774827681664, 141.381997096497 43.077208664557, 141.382627616374 43.07695034041, 141.383229854833 43.0778060924281, 141.383366701514 43.0780004629407, 141.383081310456 43.0781132203834, 141.382374385567 43.0783926290689)) ^^http://www.opengis.net/ont/geosparql#wktLiteral