Vectorial drawing and digitalisation are two essential preliminary stages for the computerised management of technical drawings, map-making, and all graphic processing in general. These two operations, indeed, are important for the memorisation of geometrical information in a numerical format, which may be later completed, corrected or modified.

Digital technical drawings have a large number of applications; for instance, they can be used by a team of professionals as a starting point for further tables, or as a basis for three-dimensional processing. Moreover, drawings in a digital format can be edited and printed out in any required scale.

As far as complex representations and instrumental surveys are concerned, studies can be carried out on the shape and potential modularity of buildings and structures. Finally, numerical surveys can be conducted on co-ordinates that have been taken to average out errors and recover the mathematical functions which best interpolate the surveyed points.