メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.314294113261 43.7789574248404, 142.314660945671 43.7793487172615, 142.315081630321 43.7797549721316, 142.314239545892 43.7802099336814, 142.31366642863 43.7805117388241, 142.31327745002 43.7807279460711, 142.313227706573 43.7806679717362, 142.312145427864 43.7810930568701, 142.311958084679 43.780106177776, 142.311931072843 43.7800057034265, 142.311797850605 43.7792947890835, 142.312416503584 43.7789719607531, 142.313641350803 43.7783293064008, 142.313914880719 43.7785901531857, 142.314294113261 43.7789574248404)) ^^http://www.opengis.net/ont/geosparql#wktLiteral