GIS tool for plotting Minimum Bounding Rectangle (MBR), Convex Hull and Voronoi Diagram for given set of input points. To avoid conflict between different working entities in a particular region there needs to exist boundaries. For example, every household in a city is associated to a particular post office. If a house belongs to another region, it would be wasteful for a postman to go out of his way to make a delivery. This is called the post office problem whose solution requires us to partition space in some way. The resulting partition of space is called a Voronoi diagram. This thesis involves, Input: _ To plot MBR, for set of US states. _ To plot Convex Hull, set of capitals from US states. _ To draw Voronoi Diagram, for set of capitals from US states. Output: _ Plotting a Minimum Bounding Rectangle (MBR) for a given point, if user selects MBR in tool bar. _ Plotting convex hull for a given points, if user select convex hull option in tool bar. _ Drawing Voronoi diagram for given points, if user selects Voronoi option in tool bar.