メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.377624796175 43.1089165786215, 141.377707712884 43.1086546144659, 141.378053447767 43.1084803788335, 141.3787310189 43.1089816812853, 141.379108252141 43.109252631881, 141.380226241718 43.1100861166311, 141.379478780115 43.1106525357268, 141.378511825847 43.1099377072306, 141.378109781005 43.1096226124521, 141.37791297227 43.1096042358337, 141.377449749667 43.1095481747226, 141.377624796175 43.1089165786215)) ^^http://www.opengis.net/ont/geosparql#wktLiteral