メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.045232244466 43.5717719241728, 142.045196258812 43.5717373668558, 142.04484953044 43.5713891491884, 142.045128394827 43.5712205422925, 142.045312627625 43.5708438915321, 142.045042739643 43.5706161323043, 142.044949630756 43.5705314390398, 142.045290640566 43.5705833375525, 142.045496193254 43.5706723745405, 142.045579891855 43.5707224157298, 142.045755272079 43.5707171657437, 142.04597263333 43.5706953925819, 142.045232244466 43.5717719241728)) ^^http://www.opengis.net/ont/geosparql#wktLiteral