Whats so special about CAD drawings?
All the things that you can do with the information when it has been recorded electronically. A paper drawing really only tells you what you can see on the paper. If you want to change the paper drawing you often have to completely redraw it. If you want more information or another view, you have to work it out and draw all over again. An electronic drawing can be adjusted as many times as you need, without having to start again each time. It can be printed or copied inexpensively and it can be transmitted directly by e-mail. If you want, the drawing can be done in a ‘solid-modelling’ programme and then you can generate photo-realistic rendered images of your idea, you can view them from any position, and you can also calculate some of the physical properties of the object, such as its surface area, its weight, centre of gravity and even map stress lines in it. And after all that, you can change the drawing a little and render or calculate it all over again.
