International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Vol XXXV, Part B5. Istanbul 2004 
  
3.4 Modelization 
The photogrammetric network and the rectified images (both 
single images and mosaic) were employed in modelling parts 
of the church (Figure 14). The common reference coordinate 
system was obtained from the surveyed control point 
network. Several commercial programs were used with this 
purpose (Shapecapture© and  PhotomodelerC). This 
modelization was only at visualization level (WRML files) 
but not for metric applications. 
  
Figure 14. Screen capture (from Photomodeler©) of a 3D 
model of the nave, arch and entrance to the chapel. Left 
chapel wall and vault textures have been suppressed to allow 
the visualization of the camera positions inside the chapel. 
4. CONCLUSIONS 
As conclusion, different surveying and photogrammetric 
techniques were successfully used for a reconstruction 
project and cataloguing of an important historical building, 
but at moderate costs with the extensive use of non metric 
and semi-metric instrumentation. 
The combinations of different methods, cameras and 
instruments have shown to be effective. These different data 
acquisition and reduction methods were necessary due to the 
wide variety of situations found. 
In some cases the data acquisition had to be very fast because 
the stability problems and collapse risks were very high, 
especially in some parts (i.e. the vault) 
All details in the church were metrically catalogued for 
further study, if necessary, for the restoration works. At 
present, current work is related with diverse aspects. The 
work is being completed with a full 3D model with metric 
quality, horizontal sections at different heights and vertical 
sections with diverse orientation. All these works will 
support the final architectural restoration project. 
REFERENCES 
Atkinson, K.B. (ed.), 1996. Close Range Photogrammety and 
Machine Vision. Whittles Publishing, Scotland, U.K. 
Ayto. Alcala la Real, 2003. Iglesia de Santo Domingo de 
Silos. El Patrimonio Artistico de Alcala la Real. Town 
Council of Alcala la Real (Dept. of Culture). Jaen, Spain. 
Cardenal, J., Mata, E., Castro P., Delgado, J., Hernandez 
M'A, Perez, JL, Ramos, M, Torres M. In press 
Evaluation of a digital non metric camera (Canon D30) for 
the photogrammetric recording of historical buildings In: The 
International Archives of the Photogrammetry, Remote 
Sensing and Spatial Information Sciences, Instabul, Turkey, 
Vol. 34, Part XXX. 
Novak, K., 1992 Rectification of digital imagery. 
Photogrammetric Engineering and Remote Sensing. 58 (3), 
pp. 339-344. 
UJA, 2003. Trabajos fotogrametricos y topometricos de 
generacion de cartografia para la rehabilitacion de la Iglesia 
de Santo Domingo de Silos (Alcala la Real, Jaen). Technical 
Report, University of Jaen (UJA), Spain. 
ACKNOWLEDGMENTS 
This research was partially supported financially by the 
Town Council of Alcala la Real (Jaen, Spain). This work is 
part of the research activites of the “Sistemas 
Fotogrametricos y Topometricos” Research Group (TEP-213; 
Junta de Andalucia, Regional Government). Main façade 
plotting and metric photographs used in this paper were 
digitized by Stereocarto, S.L. (Madrid, Spain). 
    
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