メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.206825441606 42.9648843522631, 143.205230432038 42.9647310431289, 143.205023798062 42.9622051785586, 143.20657477008 42.9623201101008, 143.206613124923 42.9627317117032, 143.206618174696 42.9627856828638, 143.2067340817 42.9640309597006, 143.206825441606 42.9648843522631)) ^^http://www.opengis.net/ont/geosparql#wktLiteral