In bringing out its potentials, Malezewski (1997) described some of the features of a SDSS to include large number of alternatives decision, spatial variables of the outcomes or consequences of the alternatives decision, evaluation of each alternative on the basis of multiple criteria, the different preference with respect to the relative importance of evaluation criteria and decision consequences of the decision maker as well as the uncertainty nature surrounding the decisions. From the works of Malezewski (1997), Klimkenberg (1997), Power (2003) and other authors who have worked on SDSS, it has been established that SDSS generally is information dependent. According to Cowlard (1991), evidence in the form of information is one of the most critical stages of decision. By implication therefore, absence of quality information (evidence/data) is a good reason for making wrong decisions (Wellar, 1990). According to Clarke, (1995) one of the basic assumptions is that more information leads to better decision.