メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.355336789954 43.0733443181458, 141.355806347448 43.0734063653835, 141.355523726867 43.0745339279671, 141.35474291188 43.0744347002519, 141.354556695022 43.0744093545689, 141.353592144895 43.0742780607241, 141.353739810796 43.073704064299, 141.353929456662 43.0731521980551, 141.355028039356 43.0733006185543, 141.355336789954 43.0733443181458)) ^^http://www.opengis.net/ont/geosparql#wktLiteral