The WKT 1 format supported only axis directions like "East", "West", "North" and "South". The WKT 2 format add support for directions like "North along 130°W", which are used over poles. However writing those directions requires a particular syntax introduced only with WKT 2. Attempts to format those directions in older format result in invalid WKT 1 string. The WKT formatter should instead throw an UnformattableObjectException in such situation.