GIS can make 2D and 3D models of spatial data. The models help planners and citizens to imagine what the data mean. For example, a graphical representation of frequently flooded areas makes it easier for planners to decide which areas are suitable for building and which are not.2D and 3D models are only a part of assistance that GIS software can offer to urban planners. GIS stores information about the real world as thematic layers. These layers are all linked by their geographic coordinates. This enables us to use the software for powerful spatial analysis. For example, we can use GIS to analyze the existing situation in the city. It can help identify areas of conflict of land development with the environment by overlaying existing land development on land suitability maps. It can also show how the geographical features of the land changed over time. This makes it easier to identify unstable terrain and plan accordingly.

Geographic Information Systems makes decision making easier, quicker and better informed. As such, it has become one of the most important components in the planning support system.