To determine the changes in land use/cover at different years, a post classification comparison of
change detection was used. Even though this technique presents few limitations (Singh 1989; Coppin et
al. 2004), it is the most common approach (Jensen 1996; Mundia and Aniya 2006) to compare data from
different sources and dates. The advantage of postclassification comparison is that it bypasses the
difficulties associated with the analysis of images acquired at different times of the year and/or by
different sensors (Yuan et al. 2005; Coppin et al. 2004; Alphan 2003). Moreover, the post classification
method also answers the amount, location, and nature of change (Howarth and Wickware 1981). A major
pitfall, however, is that the accuracy of the change maps depends on the accuracy of individual classifications
and subject to error propagation (Yuan et al. 2005; Zhang et al. 2002). A comparison between the
classified maps was carried out subsequently on a pixel-by-pixel basis (Jensen and Ramsey 1987).