メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.344266233488 43.7765823593526, 142.344494735583 43.7770086313787, 142.343118435005 43.7773964788193, 142.343091874388 43.7774005450703, 142.343252675112 43.7776134341203, 142.341549405638 43.7778091892002, 142.341816771605 43.7768014894083, 142.34219769349 43.7767026397283, 142.342600256009 43.7765906373712, 142.342823236284 43.776525089563, 142.344047246104 43.7761629700957, 142.344266233488 43.7765823593526)) ^^http://www.opengis.net/ont/geosparql#wktLiteral