メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.757534163168 43.1815598300807, 141.757560632316 43.1815727440414, 141.758002211275 43.1817837301197, 141.758486999137 43.182035832269, 141.758512312646 43.1820490218889, 141.759053448059 43.1823157114665, 141.757946289074 43.1834790367969, 141.757068342076 43.1844098516481, 141.75647055858 43.1841110511485, 141.755994813022 43.1838748046175, 141.755555941165 43.1836368869869, 141.755123964352 43.1834321914992, 141.756036249961 43.1824997107298, 141.757131341176 43.1813636364904, 141.757534163168 43.1815598300807)) ^^http://www.opengis.net/ont/geosparql#wktLiteral