It is the moment of truth of the whole operation: we must prepare the answers to the questions that we raised in the survey user.
    It remains beyond any doubt that man, as soon as he enters an environment, makes a visible relief: therefore this type of relief must also be possible on the virtual model. For this to happen, the photographic image must be taken within a 60 degree angle (normal lens). Finally thanks to the digital image, which, in a continuous or discontinuous way, guarantees us a real-time frame-change, we can ban wide-angle lenses or telephoto lenses, which have always been the trigger for optical illusions.
    In the hypothesis that the user is interested in more precise measurements, all that remains is to make available to him the stereometric model of the area concerned. If the mouse click has been engaged to recall documents relating to the area indicated by the cursor, another event (e.g. a button) can be connected to the click to recall the photogrammetric survey. Also in this case it is necessary to offer different choices. For example, the filming scheme can be made available, or the filming card directly, which must also be accessible from the floor plan or, in any case, when the need arises. In the case of numerous choices, it may be useful to use the click to open a menu in the area concerned and therefore allow the choice of the most useful route.  
   There remains the case of monuments that require a real-time survey, in which case it is possible to resort to the installation of one or more WebCams (also of the stereometric type and remotely controlled) that can transmit images at desired time intervals.  
   For example, the "StereoFot-on line" program, written in the "Java" language, provides a shooting card, containing, in addition to the shooting data, the pair of frames, observable in stereo with crossed visual axes. It also has some menus that allow you to access:  
    - to the other shooting records of the monument, using the "PHOTOGRAMS" menu;  
    - a "test" card to check the accuracy of the system;   
   - to one of the two frames, selecting the "frame" item from the "TOOLS" menu;   
   - the instructions for use, selecting the "help" item from the "TOOLS" menu;  
    - to the general recovery scheme, selecting the "plan" item from the "PLANS" menu;  
    - to the monument card, selecting the "card" item from the "TOOLS" menu;  
    - to the general plan of the urban center to which the monument belongs, by selecting the "country" item from the "TOOLS" menu;  
    - to the return program, by selecting the "return" item from the "TOOLS" menu. The user can detect the distance between two points or record the coordinates of a certain number of points to represent them in the xy, xz and yz planes, on which he can also draw "freehand".  
   Once research is complete, the "StereoFot-on line" program will allow reverse photogrammetry, ie stereometric representation of new objects in the virtual model. It was preferred to compile the program in the form of an "applet" rather than an application to be distributed, for the following reasons:  
    - make available to everyone, via the network, continuously updated software;  
    - create a documentation center which, in addition to being the custodian of the findings, is also an archive, which can be consulted by everyone, of each study intended to transform the territorial reality;   
   - give rise to a remote school, which in exchange for training can receive documentation of the territory as a "payment";   
   - allow the spontaneous formation of "discussion groups" on the findings made, therefore a continuous updating and monitoring of the territory.

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