メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.406965729821 43.0666939362911, 141.40766034171 43.0674275969172, 141.407218136957 43.0676304084696, 141.407102126749 43.0679905569755, 141.40697141715 43.0684012354849, 141.406328186887 43.0682787646866, 141.40587971118 43.0680427366754, 141.405433368474 43.0678052462841, 141.404715175273 43.0675122261961, 141.40542918719 43.0668094849464, 141.405757172439 43.0664788922084, 141.406444741191 43.0661291472019, 141.406530278655 43.0662219800795, 141.406943207424 43.0666714755152, 141.406965729821 43.0666939362911)) ^^http://www.opengis.net/ont/geosparql#wktLiteral