2.2 THE IMAGES OF THE BASILICAL DOMES 
If the David is located in the branch of 
research of the  3-D representation, the 
images ‘branch is studied in the St. 
Marcus domes. In particular in the 
applications of the Spirito Santo's 
(Pentecoste) (Fig.2) and Ascensione's 
domes the corresponding DTM has followed 
the methodology before indicated. 
We are working with a geometric surface 
not plane, but easly  trasformable to a 
semispheric spatial shape, without hidden 
points and discontinuites; it's the DTM 
of the dome (Fig.4). 
Unfortunately the times of intervention 
on a monument open to the public, with 
4000 visitors every day, make every 
operation always very long and, for this 
reason, we are still in a qualitative 
phase of individualization of the 
methodological process illustrated in the 
associated paper (Brumana R., Vassena G. 
"St.Marcus’ Basilica in Venice. Analysis 
of digital images projection”). 
The projection of an image on its 
belonging surface has, as a consequence 
the overcoming of the conception of 
bidimensionality of the image. 
It happens a convergence between the 
disciplinary approach of the conservative 
intervention on the surfaces and the 
disciplinary approach on the survey 
itself. 
In fact a relation more and more closer 
with the third dimension appears. It 
FIG.4 THE DOME OF ASCENSIONE. ST. MARC 
THREE-DIMENSIONAL ELABORATION 
US’ BASILICA. 
   
creates a new bridge between two worlds 
that, in the history of the restoration, 
had follow different assumptions and 
operative choise. The first one of the 
structures and the second of the 
surfaces, decorated, plasted, with 
mosaic...., that too often has been 
reduced to the images. Infact often the 
matter, which introduced a great cultural 
thickness, also physically, is  negleted 
(Fig.5). 
This research has been developed using of 
Fondi MURST 40% 1990/1991 
REFERENCES 
1. R.BRUMANA, G.GALEAZZO, C.MONTI, E.VIO, 
"Rilievo e rappresentazione della Basilica di San 
Marco a Venezia:  iconografia storica e attuale 
per un sistema informativo integrato". Atti del 
CIPA XII Symposium International de 
Photogrammetrie Architecturale, Roma 1989. 
2. G.GALEAZZO, "Approccio metrico ai grandi 
organismi architettonici: metodiche analogiche e 
digitali nei rilievi della Basilica di San Marco 
a Venezia". Atti del convegno "Componenti 
architettoniche dell'identita' ambientale: 
situazione attuale e linee di tendenza", Milano, 
aprile 1988 
3. M.MATTEINI,  A.MOLES, "Scienza e restauro - 
Metodi di indagine", Firenze 1984. 
4. R.BRUMANA, "The Hall of the Fountain in the 
Zisa'palace and the Palatina’s chapel in the 
Norman palace in Palermo.  Graph-numerical data 
bank and image data base to run and use different 
surveies". Atti del CIPA XII Symposium 
International de Photogrammetrie Architecturale, 
Delphi, 2-5 October 1991. 
5. R.BRUMANA, B.CRIPPA, G.VASSENA, "Analytical 
treatment and description of the altimetric 
check of the St. Marcus’ Basilica in Venice", 
ISPRS Symposium Commission V, Zurich, 3-7 
Settembre 1990. 
THE PHOTOGRAMMETRIC 
RESTITUTION: THE DIGITAL MODEL HAS BEEN TREATED WITH SOLID 
MODELLING AND SMOOTHING OF THE ELEMENTARY SURFACES.