メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.750354327664 43.2062127143743, 141.750036796724 43.20654468236, 141.750009402717 43.2065733267559, 141.749762016222 43.2068333737115, 141.74962256256 43.2069800312518, 141.749392241267 43.2072222181577, 141.749308646199 43.2073100440423, 141.749005489383 43.2076405251526, 141.748493170965 43.207383835534, 141.74821645133 43.2072452014401, 141.747988188626 43.2071242214393, 141.747776009151 43.2070117509134, 141.749131400029 43.2055956572777, 141.749352812573 43.2057073923622, 141.749509502289 43.2057864234808, 141.750354327664 43.2062127143743)) ^^http://www.opengis.net/ont/geosparql#wktLiteral