メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.99308091703 43.1123153383092, 142.993048402586 43.1123216683252, 142.991703522286 43.1125729636367, 142.990919466896 43.1103977206764, 142.992345120003 43.1101060335376, 142.99238144524 43.110101366942, 142.992667445969 43.1107790450394, 142.992934400672 43.111591601455, 142.99308091703 43.1123153383092)) ^^http://www.opengis.net/ont/geosparql#wktLiteral