Computer aided design and geographic analysis have earned their place in modern architecture, planning and engineering. These specialized technologies, enable professionals to communicate better through simulations and visualizations of their works and ideas. Computer-aided design (CAD) is the use of computer technology for the design of objects, real or virtual. CAD often involves more than just shapes. As in the manual drafting of technical and engineering drawings, the output of CAD often must convey also symbolic information such as materials, processes, dimensions, and tolerances, according to application-specific conventions. In fact, most CAD users are focused on: productive editing tools, visual clarity, symbology and dimensions.
