メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.355272576879 43.1038433416159, 141.355741158295 43.1039081074164, 141.35630686706 43.1039797469164, 141.356321907806 43.1039816923066, 141.356001019418 43.1052285415229, 141.355924566884 43.1052189444745, 141.355421693344 43.1051554610562, 141.35540636496 43.1051535124646, 141.354976302573 43.1050992448746, 141.354403666536 43.1050217099434, 141.354552670182 43.1044070915344, 141.354720952918 43.1037668832486, 141.355272576879 43.1038433416159)) ^^http://www.opengis.net/ont/geosparql#wktLiteral