The return of the frames

As for the return, that is the detection of information of the stereometric pair of frames, there was the possibility of:
- obtain photoplanes with scale printing of aerial photographs;
- analyze the territory on photographic enlargements , from which it was possible to obtain heliographic ciopie;
- polish the photos to get finalized graphics;
- analyze, with stereoscopic observation , the pairs of frames;
- analyze the details with optical and stereoscopic magnification;
- take some measurements with the stereomicrometer ;
- discuss the survey, looking at the frames at the same time con lo stereoscopio a doppi oculari;
-proceed with the two-dimensional graphical representation of the information finalized with the optical-mechanical restitutor.