メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.331008793896 43.7652775700832, 142.330322249812 43.7650686909708, 142.329838651787 43.7649082233275, 142.329198498564 43.7647062311757, 142.328865557567 43.7646088210077, 142.328829171041 43.7645964695822, 142.329471086998 43.7634967257056, 142.330181802382 43.7637253536784, 142.331671512945 43.764178379624, 142.331008793896 43.7652775700832)) ^^http://www.opengis.net/ont/geosparql#wktLiteral