Moreover, decreases of image spatial resolution lead to spectral mixing of different categories produce spectral confusion between covers (Yang and Lo 2002). These could be the reasons to have the least accuracy for the land cover map derived from the MSS data in addition to registration error (Townshend et al. 1992). Misclassifications were between built-up areas and bare soil/landfill category. In addition, some water bodies were interpreted as wetland.