Il rilievo del modello

Numerous scientific papers attest to a renewed interest in the survey activities in architecture, engineering, archeology, planning (to name only the contexts of our interest). The survey, always question for architects and engineers, is that particular discipline that is perhaps more than others, in a sense almost tautological, the will and the possibility of understanding reality. The digital technologies have brought important methodological consequences with some very positive effects but also some contraindications. An argument, repeatedly stressed by scholars, particularly invested by the wind of renewal is synthesized with the antithesis objective / subjective. From the Renaissance onward, until the eighteenth century and beyond, the architectural survey is highly personalized. In the drawings of Letarouilly, 800 in full, it prevails subjective criticism to try to trace the image of a building which the architect would have wanted it to be and not to the factual situation that is presented to the eye. The so-called objectivity of the survey is definitely linked to the evolution of instrumental technique but it is primarily a cultural problem of approaching the object to be detected. The survey is, and remains, a cultural product, strongly influenced by the historical context in which it appears, therefore also to contemporary. In the last fifteen years two innovations have revived the attention and interest in the survey: 3D laser scanner and digital close-range photogrammetry. They are derived from different techniques, but going into the question it discovers contamination and similarities. In spasmodic production of interpretative models that new technologies allow to do, in their figurative ratification, it seems to prevail at times an himself damage will of neutrality, lack of critical, a technology submission in the name of objectivity. It is important to safeguard the uniqueness and continuity of the phases of survey, that the measurement operation is immediately after the interpretation of architecture, and immediately prior to the representation and that the interposition of new models, improperly considered objective because products automatically, within this process does not undermine the continuity and so consequently the subjectivity