By relief of an object is meant that set of information necessary and sufficient to allow the analysis, deferred in time and space, of the object itself. It is evident that the number of information is directly proportional to the complexity of the detected object and to the interest of the user for the survey itself, but, of course, the survey remains the result of a series of compromises, which are a function of the same territorial reality in which it runs.
  The computerization of the survey has undoubted advantages both for archiving and for consultation, which can also be done remotely, but poses new problems and among these we cannot overlook:
   - the master's knowledge of the computer language with which the survey will be returned and archived. The classic problem of languages ​​remains alive, a report in English cannot be written in Italian and then translated, but "must be thought in English"! The same theme of architectural design is re-proposed, which, thanks to the CAD programs, must be conceived and executed directly in the three-dimensional space;  
  - the modular execution of the survey, such as to allow easy updating and / or integration;  
  - the execution time of the survey, measured in man-hours, far from secondary and on which the cost of the survey itself depends;  
  - maintenance of the survey, due to the continuous evolution of information technology. The subdivision of information technology into the three competitive fields (Intel, Macintosh and UNIX) is no longer admissible with the advent of the Internet and the World Wide Web and the problem of the portability of the programs, which has come back violently, allows us to foresee the arrival of new languages. An example of maintenance can be the experimentation, carried out at a professional institute in Bari, in which a schoolchild has ventured into the transcription, in HTML language, of a work (the Russian church) written in HyperCard language by a group of students who have attended this workshop in the period 1991-1996. .  
  - literacy. The use of new languages ​​does not end with learning grammar. Already the use of self-teaching in learning the photographic language has led to a distorted use of the same camera, with the illusion that any photograph was able to communicate a message. The illiterate of 2000, faced with the possibility of using interactive images or texts, often goes from an initial refusal to an irrational use of the new language, also thanks to programs existing on the market.  
   Here we will make a distinction between architectural and urban relief, simply for reasons of discussion, but we will never be able to treat one without referring to the other, because one cannot speak of a building without "going out" in the the environment in which it is inserted, nor can we speak of an urban center without "entering" into the buildings it contains.

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