メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.751313250884 43.1936272479136, 141.750662708778 43.1942927422768, 141.749589091784 43.1937539172409, 141.74984254203 43.193490649303, 141.749452431156 43.1932824148828, 141.749843488148 43.1928851986592, 141.749953106278 43.1929407524515, 141.750234586246 43.1930834114648, 141.750417900329 43.1931762701418, 141.75124866094 43.1935972880172, 141.751313250884 43.1936272479136)) ^^http://www.opengis.net/ont/geosparql#wktLiteral