メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.351576185756 43.0346130327456, 141.351508722352 43.0351104418542, 141.351448257847 43.0355683804077, 141.34979665138 43.0354430085108, 141.349812321838 43.0351842460152, 141.349842638836 43.0349925532138, 141.349854801077 43.034875337472, 141.349907496908 43.0344971637868, 141.34997985553 43.0338361363394, 141.351649580752 43.0339585523024, 141.351642229136 43.0340156726025, 141.351576185756 43.0346130327456)) ^^http://www.opengis.net/ont/geosparql#wktLiteral