メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.521584496377 43.8567464366337, 141.521524061781 43.8568691993921, 141.521328935046 43.8573112019692, 141.521295712914 43.8573659007101, 141.521242611873 43.8574650131746, 141.517474333715 43.8564510761581, 141.517529370746 43.8563808278786, 141.517691824827 43.8559543137698, 141.517747150142 43.8558605269939, 141.517761343958 43.8558282090202, 141.518401442485 43.8559661156291, 141.519935056243 43.8563408432074, 141.521584496377 43.8567464366337)) ^^http://www.opengis.net/ont/geosparql#wktLiteral