メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.366249410717 45.1186802707155, 142.364069062124 45.1184938070809, 142.364228603688 45.1180729412147, 142.364357584401 45.117571676595, 142.36469928716 45.1162242190991, 142.366034222075 45.1163659195103, 142.36679471342 45.1164473185325, 142.366519983718 45.1175305089506, 142.366483793904 45.1176733337942, 142.366385677848 45.1180900627057, 142.366249410717 45.1186802707155)) ^^http://www.opengis.net/ont/geosparql#wktLiteral