メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.367654272665 43.0993573595377, 141.368113225701 43.0994168042313, 141.368686409639 43.0994880964666, 141.36845188537 43.1005342895941, 141.367865964753 43.1004671189618, 141.367788745695 43.1004575927703, 141.367403511471 43.1004102493884, 141.366891436645 43.1003470181671, 141.367138932993 43.0992881965658, 141.367654272665 43.0993573595377)) ^^http://www.opengis.net/ont/geosparql#wktLiteral