To have an integrated model in which all the data component have been tightly coupled, the overlay (by intersection) analysis was performed to integrate all the land use themes and their buffers into a single theme called the land use criteria as shown in Figure 7. This was done so that when a query involving common areas among the various landuse is given, a solution may be obtained. The internal layout of the SDSS can be previewed from the welcome page which displays the various aspects of the system (Figure 8a). These can be accessed with the click of the mouse. The building search, road network, water pipeline and sewage line search components were incorporated to allow decision maker have direct insight into present physical development and be able to make timely information-driven decisions on future development. For instance, the building search can be used to find the location of any building within the university as shown in Figure 8b, while others except for the site locator, were designed for inventory mapping.