What is Computer Aided Design ( CAD) in Surveying ?
In addition to the production of DGMs and contoured plans, a computer-based surveying system permits the finished plan to be easily related to the designed structure. The three-dimensional information held in the database supplies all the ground data necessary to facilitate the finished design. Figure 1.16 illustrates its use in road design.
The environmental impact of the design can now be more readily assessed by producing perspective views as shown in Figure 1.17. Environmental impact legislation makes this latter tool extremely valuable.