メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.413881677417 43.783076674527, 142.41378258169 43.7830018163012, 142.412705447946 43.7823216474249, 142.412263052261 43.7820405577117, 142.411741346868 43.7817160991993, 142.411418920881 43.7815316191685, 142.412043866861 43.7810084274599, 142.41259037009 43.780538347309, 142.413525482666 43.7811415747332, 142.414292464038 43.7815741829648, 142.414982942465 43.7817543692717, 142.413881677417 43.783076674527)) ^^http://www.opengis.net/ont/geosparql#wktLiteral