メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.909536656187 43.4868406849355, 141.909984626386 43.4864377820432, 141.910195077857 43.4872167137754, 141.909556223719 43.487434827601, 141.909496960485 43.4872945954168, 141.908876924806 43.4873995367741, 141.908988602348 43.4873101680683, 141.909184960445 43.4871570202463, 141.909146573778 43.4870316545326, 141.909143295706 43.4869149371829, 141.90914376142 43.4868323748683, 141.908907073999 43.4859727344959, 141.909247939541 43.4859230103421, 141.909536656187 43.4868406849355)) ^^http://www.opengis.net/ont/geosparql#wktLiteral