4 — An archaeologic map of Rome 
distinguish by different colouring the ruins originating from a different epoch, 
thus furnishing an information not necessary, of course, for the cadastral Sur- 
vey, but obviously very important for cultural aims. 
According to the above mentioned purposes, performing of work under 
the direct guidance of the General Direction of Cadastral Survey was decided, 
having this Administration an experimental air surveying laboratory provided 
with Nistri's plotting apparatus (the well known Photocartograph Aeronormal) 
at its disposal. For the purpose of a better and adequate division: of tasks, the 
kind collaboration of the Superintendence of Palatinum and of the Forum 
Romanum was requested. The latter furnished for the first sheet of the map, 
already accomplished, a both precious and expert contribution, for which I 
like to express my best thanks. 
The sheet I mentioned above is shown at the Exhibition of Photogram- 
metry connected with the 7th International Congress at Washington. It covers 
one of the most important parts of Palatinum, i. e. the temple of Cibele, the 
house of Livia, the palace of Flavias, the temple of Apollo, etc.: marvellous 
ruins well known by archzologists and foreign visitors. 
Further sheets, already surveyed, will be completed by means of air 
photogrammetry, in order to cover the entire area of Palatinum and of the 
Forum. 14 sheets are necessary for this purpose. 
Contemporary with these archæologic sheets, other map sheets 
are elaborated for cadastral purposes only. The latter contain only topogra- 
  
phic details, which according to laws — must be completely and accurately 
) 
reproduced for the entire area of the Municipality. 
As regards photogrammetry, the above mentioned work may be consi- 
dered an important and special application of the method established for pla- 
nimetric completion and integration by contours of field surveyed maps by 
means of air photogrammetry. This combination of proceedings is of a consi- 
derable importance also from a conceptual and scientific point of view, as it 
constitutes a harmonizing synthesis of different surveying methods, the classi- 
cal and the modern ones; it permits to apply each other without any prejudi- 
ce and with evident usefulness as well as with best results. 
A kind and precious contribution was given to the Cadastral Admini- 
stration by the ETA Ltd. of Rome, an Air Survey Company belonging to Ni- 
stri's group. This company - having carried out an air survey of Rome for 
town-planning purposes - kindly put on the disposal of the Cadastral Survey 
the photographs and photo-prints of the Palatinum area.