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ORGANISATION AND FORM OF METRIC DOCUMENTATION ON PATRIMONIUM 
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Jacques Debie 
Division du Patrimoine 
Ministère de la Région Wallonne de Belgique 
J.Debie@ mrw.wallonie, be 
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KEY WORDS: Monuments, Sites, Close-Range, Digital Photogrammetry, Aerial Photogrammetry, Terrestrial Photogrammetry 
ABSTRACT 
chenau-Oberzell, 
Although limited to only a small territory, the Walloon Region reassembles a large variety of monuments and archaeological sites. 
Since the institutional reforms of the Belgian State, some ten years ago, each regional government is now responsible for its own 
heritage management. This ten years period coincides with a period of fast evolutions of these techniques and logistics, which are 
indispensable while collecting the necessary documentation on cultural heritage, buildings and sites. This gave us a lot of new 
opportunities, certainly bringing in digitised images and laser topography. 
In: CIPA, XIII 
The Heritage Department technical team is especially interested in constituting an extensive and reliable documentation on all of its 
major monuments. Due to circumstances, the team has to concentrate on mapping and isolated measurements in the first place. In a 
second time the photographic documentation (analogical and semi-metrical) is assembled for archivists purposes. The same semi- 
, Stuttgart. 
metric camera is used for terrestrial photography as well as for vertical aerial photography. Starting from close range 
photogrammetry (6x6 format), the team works towards digital photogrammetry by correcting the images to create a 2D single- 
der Bau- und 
Steinzerfall und 
image-evaluation and the measurements on multi-images to obtain a 3D evaluation. 
The collaboration of the Heritage Departments team with the Belgian universities opens the possibility for students to exploit the 
existing documentation for their (MA-)theses also made in the interest of the Department, which defines the criteria for the study’s 
vissenschaftliche 
en-Württemberg, 
length, form, precision and eventual extension. 
1. HERITAGE IN WALLONIA - AN UPDATE 
nd Tafelband pp. 
As the southern part of the Belgian federal state the Region of Wallonia is located between France in the west and 
Germany at the east with the other Belgian regions (Brussels and Flanders) in the north; this means at a cross-road of major historical 
Indeskonservator 
events in Western Europe. 
n am südlichen 
heft 9, Stuttgart, 
Although there are only 265 km between the two most distant towns of Wallonia, the region counts some 2737 monuments, 552 sites 
and 33 architectural complexes. There are also about 40 permanently opened archaeological sites. The variety is important. A 
prehistoric mine, a cathedral, its belfries, an industrial canal are on the UNESCO World Heritage list, but there are other less famous 
but important sites like its abbeys, Roman villas, medieval ramparts, castles etc. 
2. THE ASSIGNMENT 
The creation of a new department of topography and photogrammetry belonging to the Ministry of the Region of Wallonia in charge 
of Walloon heritage has given us the opportunity to use modern methods of spatial surveys since 1991. 
The main assignment of the service for topography and photogrammetry of the Department of Walloon Heritage is to answer as 
quickly as possible to the practical problems encountered by the archaeologist, the art historian or the architect about the dimensions, 
spatial disposition and geographical location of a monument or a site he is working on. 
The needs in metric documentation about monuments are important. Metric documentation, along with other types of documents, 
allows the Walloon historian to trace back the evolution and history of a monument. Also, metric documentation allows the 
archaeologist to understand the very process of his own investigation in the field and to understand the history and function of his 
study matter. In the future, a precise survey for all important restoration projects will be asked, due to the adoption of a new legal 
regulation. Of course, this will increase the use of photogrammetry for architectural purposes. 
The great variety of monuments to be measured and the final destination of the survey imply, for each subject, a dialogue between 
the commissioner and the service. The precision, the configuration of output data and the territorial limits of the survey have to be 
debated. This avoid wasting time while in the field. The chosen methodology must correspond to the demand in precision as well as 
in survey quality. 
A part of these, the surveys are to be completed by the commissioners themselves; the details in their possession have to allow an 
immediate interpretation. 
To fulfil its tasks, the service can count with the help of technicians, based in its provincial centres. They received an adequate 
training in the use of topography material. 
Stereophotogrammetry is sometimes used for archaeological purposes. 
Proceedings 18 th International Symposium CIPA 2001 Potsdam (Germany), September 18 - 21, 2001