メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.371926834513 43.8178805594167, 142.370350684339 43.8167528729131, 142.371946476065 43.815614861696, 142.372410950989 43.8152808542373, 142.372811680751 43.8149964367209, 142.372835630473 43.8149787429715, 142.373324506124 43.8153337366914, 142.373694838396 43.8156031327825, 142.374080735432 43.815865355147, 142.37449506103 43.8161706182683, 142.371926834513 43.8178805594167)) ^^http://www.opengis.net/ont/geosparql#wktLiteral