メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.348338290428 43.0337289680425, 141.348795385135 43.0337564110755, 141.349563958001 43.0338039575752, 141.34997985553 43.0338361363394, 141.349907496908 43.0344971637868, 141.349854801077 43.034875337472, 141.349842638836 43.0349925532138, 141.349812321838 43.0351842460152, 141.347821101247 43.0350489289665, 141.347858506703 43.0347206407942, 141.347905334751 43.0343576843878, 141.347980072347 43.0338564668125, 141.348013179589 43.0337036890719, 141.348338290428 43.0337289680425)) ^^http://www.opengis.net/ont/geosparql#wktLiteral