メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((139.637417997421 35.4460005080984, 139.636422375537 35.4465447166571, 139.636078821518 35.4460897820142, 139.637016741626 35.4455618569629, 139.637417997421 35.4460005080984)) ^^http://www.opengis.net/ont/geosparql#wktLiteral