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International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Vol XXXV, Part BS. Istanbul 2004 
the restitution of three-dimensional elements simultaneously on 
the photographs of 1936 and 2003, and to superimpose and 
display these results within a unique project. 
  
Figure 9. Overview of the camera stations and the block confi- 
guration after the exterior orientation. At the right: a vertical 
view of 1935 allowing the location of the camera stations. 
4.6 Addition of other images in the project 
Depending on the parts of the castle to model, any other recent 
or archive image can be imported and oriented within the 
project by identification of homologous points. 
5. PREPARATION OF ARCHAEOLOGICAL 
EXCAVATION 
From the block of images previously oriented, the restitution 
initially carried out in 2D in Autocad (e.g. fig. 7 and 8) will be 
enriched by a 3D restitution corresponding to the objectives of 
the documentation. We are then able to calculate and draw the 
visible structures from the aerial and terrestrial photographs of 
2003 by digitalizing on the images. One will proceed in an 
identical way on the archive photographs to measure the 
archaeological structures currently covered by the remains of 
the war currently embanked or destroyed (fig. 10), or to plot in 
3D parts of the castle (see §6). 
  
Figure 10. Restitution of the embankment areas: on the left, the 
boundary of the embankment is marked on a photo of 2003 and 
on the right, the corresponding surface is projected on an 
archive photo of 1936 
The superposition of the two restitutions makes it possible to 
highlight the areas of interest (figures 10 and 11) for 
archaeological work and to estimate work of civil engineering 
(fill, cubature, rebuilding, etc). 
Morcover, the restitution of the site in wire frame and surface 
model can be supplemented by the addition of textures coming 
   
either from the images of 1936, or of those of 2003. From the 
resulting 3D photomodels, orthophotos can be calculated for the 
two periods, as e.g. for the frontages of the castle or the 
installations around the site covering the archaeological 
structures (fig. 11). 
1936: 
  
2003: 
  
Figure 11. Archaeological structures are measured on the 
archive images of 1936 and the corresponding surface is shown 
on the photos of 2003 
  
Figure 12. Example of orthophoto of the archaeological 
structure (computed from an archive image of 1936). 
6. RESTITUTION OF THE HISTORICAL 
STRUCTURES NOWADAYS DISAPPEARED 
The aim of the restitution is to help the consultant to establish 
the framework of the excavation and restoration tasks, by 
showing the destroyed historical structures. 
The study is currently focused on different parts of the castle 
(figure 13). For some of them (as courses of bricks or 
stoneworks "label B"), a 3D restitution of both archive and 
recent images is possible. 
Parts recovered by embankment are modelled from only archive 
images (watering place “label A”, counterscarp “label C" and 
archaeological remains on the western part of the castle “label 
127.