メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.773621116885 43.2070110089959, 141.773453859052 43.2069266941444, 141.773357794755 43.206879315078, 141.772897285001 43.2066361033394, 141.773255133581 43.2062516302428, 141.773415157482 43.2060849145844, 141.773254502772 43.2057324649157, 141.773571611579 43.2058825268155, 141.773996848241 43.2069237447981, 141.773621116885 43.2070110089959)) ^^http://www.opengis.net/ont/geosparql#wktLiteral