メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.358674437148 43.1071370065282, 141.358211054174 43.1070827772927, 141.357753319356 43.1070164933421, 141.357496779302 43.1069820815844, 141.357196151637 43.1069433173038, 141.357249697212 43.1066805028089, 141.357359546658 43.1062685422964, 141.357387148651 43.1061592597245, 141.35886252001 43.1063610161258, 141.358768684309 43.1067348418759, 141.358674437148 43.1071370065282)) ^^http://www.opengis.net/ont/geosparql#wktLiteral