メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.335343225895 43.756334154745, 142.334950997878 43.7569994066137, 142.334728350614 43.7573851979593, 142.334701170004 43.757431294961, 142.333970312707 43.7572051821085, 142.333523781927 43.7570712197063, 142.33357608796 43.7569784092416, 142.333763745441 43.7566544456431, 142.333773997975 43.7566367472815, 142.33377509817 43.756634931844, 142.333546405801 43.7565640444635, 142.333921787581 43.7559091669313, 142.334616276445 43.7561164978193, 142.3351355161 43.7562703549195, 142.335343225895 43.756334154745)) ^^http://www.opengis.net/ont/geosparql#wktLiteral