メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.358875009748 43.0630295480433, 141.359235692725 43.0630803212475, 141.359992834435 43.0631821406315, 141.359697899995 43.0643213690281, 141.359635093598 43.0643132844103, 141.359351217709 43.0642768961987, 141.359311867815 43.0642718773347, 141.358988643511 43.0642303991375, 141.35892727426 43.0642225368696, 141.35861833093 43.0641817302583, 141.358139173454 43.0641184261758, 141.358203206345 43.063869746226, 141.358240199671 43.0637262802391, 141.358358301221 43.0632678075947, 141.358435642711 43.0629677511818, 141.358875009748 43.0630295480433)) ^^http://www.opengis.net/ont/geosparql#wktLiteral