“…Many of the world's wetland systems are being converted to agricultural or urban use and this change can be monitored using remotely sensed data (Ringrose et al 1988, Williams 1990, Mackey 1993, Markham et al 1993, Jensen et al 1995, Haack 1996 recorded at different times (Singh 1989). Each change detection method has its own merits and no method is optimal in all cases (Singh 1989, Mouat et al 1993, Deer 1995, Coppin and Bauer 1996, Serpico and Bruzzone 1999. Examples include band differencing (Weismiller et al 1977, Wink andKing 2006), transformed band differencing (Nelson 1983), ratioing (Howarth and Wickware 1981), regression (Singh 1986), principal components analysis (PCA) (Byrne et al 1980, Liu et al 2004) and change vector analysis (CVA) (Malila 1980, Nackaerts et al 2005.…”