268 
CIPA 2003 XIX 11 ' International Symposium, 30 September - 04 October, 2003, Antalya, Turkey 
6. CONCLUSIONS 
The true digital orthophoto is a product that is particularly 
suitable for the representation of urban areas by large scale 
maps and it is an important instrument for the integration of 
the practical aspects of GIS/LIS in a municipal environment. 
The generation of the DDEM through the use of already 
existing 3D digital cartography leads to a reduction of the 
production costs of the orthophoto, making it necessary to 
restitute only some monumental and new buildings. The 
ACCORTHO software, integrated with the GENEDDEM 
module, after the modifications that have here been described, 
allows true orthophotos to be produced in a quick and cheap 
way with a high degree of automation. 
Figure 10 - True orthophotos of: (a) Gran Madre Church, 
(b) Holy Shroud Cathedral and Royal Palace 
ACKNOWLEDGEMENTS 
This study derives from a research contract drawn up between 
the Politecnico and the Municipality of Turin - Land Registry 
Division (LRD). Aerial photos and the basic data were 
supplied by CSI-Piemonte. Thanks are due to Dr. Eng. Andrea 
Margaria (LRD Director), and all the Municipal officials and 
technicians for their active collaboration, and the Mapping 
Sector of CSI-Piemonte (in particular its responsible Mr. 
Bemabino) for the willingness that was always shown. 
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