メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.420356683239 43.8207698282689, 142.418740252796 43.819611829457, 142.419437951421 43.8191184280575, 142.419539991512 43.819188790036, 142.419692912513 43.8190928036072, 142.419596001293 43.8190118166443, 142.42314139377 43.8165247355282, 142.424256408083 43.8167080425694, 142.425260978402 43.8171006225313, 142.420356683239 43.8207698282689)) ^^http://www.opengis.net/ont/geosparql#wktLiteral