143 
'EREOVIEW 
of automatic 
les of images 
tune in the 
togrammetric 
he following 
ducial marks 
irallaxes and 
erent images 
elevation of 
ppraising the 
I through the 
he phases in 
the image 
points in at 
d to the no 
II mechanism 
des of open 
difficulty the 
repetitive; 
îat can bring 
ones for the 
ght between 
geometry of 
covered by 
»ective effect 
that can be 
:t types: 
f areas ( they 
according to 
)f details; 
d than to the 
s quota of 
formation of 
mention to an 
: to compare 
the curves of level obtained during the phase 
of analytical plotting with those derived from 
the digital one. 
Difficulty sufficiently individualising an area 
of deprived territory of buildings or of 
manufactured articles, that would have 
involved an alteration of the elevations of the 
points taken in consideration, has made very 
difficult this operation. 
Fig. n.3 - Different zoom of a same image particular (a 
wall comer). 
An interesting aspect of the performed test has 
been the overlap between the DXF file 
obtained as final product of the Analytical 
plotting and the stereoscopic model formed by 
the Digital System Stereoview. 
The fig. n. 4 shows this aspect. 
This particular function is very useful in the 
cases of updating of cartography, so that to be 
able to individualise easily possible areas 
different from those already plotted. 
3. Conclusions 
In conclusion we can affirm that three are the 
principals motives that can do the Digital 
Photogrammetry the principal 
photogrammetric technique at all the levels: 
• the cost of the System is enough reduced, 
because it needs a standard personal 
computer and a minimum set of 
accessories; 
• the transition from the traditional 
Photogrammetry to the digital 
Photogrammetry based on the use of 
commercial software produces a 
substantial effect which determines an 
extensive diffusion of this discipline 
dominion of a few experienced up to now. 
• The simplicity of use of this 
Photogrammetric system can be notably of 
help in the didactic experience. 
Acknowledgements 
This work was funded with the funds of 
MURST - COFIN97. 
References 
Ackermann F., Hahn M., 1991. Image 
pyramids for digitai photogrammetry. ISPRS 
Intercomm, Working Groups II/III, in “Digital 
photogrammetrics Systems”, Munchen 
Casella V.,1998. Il sistema di fotogrammetria 
digitale Leica DVP per l’aggiornamento di 
cartografia a grande scala. Bollettino SIFET 
n.2 
Krauss K., 1993. Photogrammetry. Vol.l, 
Dummlers Verlag, Bonn. 
Krauss K., 1993. Photogrammetry. Vol.2, 
Dummlers Verlag, Bonn. 
Gaietto R., 1998. La sperimentazione in Italia 
nel campo della fotogrammetria digitale :un 
percorso da alcuni appena iniziato. Bollettino 
SIFET, n.2 
Pellegrinelli A., Russo P., 1998. . Il sistema di 
fotogrammetria digitale Leica DVP: risultati di 
alcune prove sperimentali. Bollettino SIFET 
n.2