EXPERIENCES AND PROCEDURES ON MAKING TECHNICAL DOCUMENTATION
FOR THE OBJECTS OF HISTORICAL AND CULTURAL HERITAGE
D. Kukolj *, D. Mihajlovic °, L. Nedeljkovic *
* MAPSOFT Ltd, Zahumska 26, Belgrade, Serbia and Montenegro — (gis, photo)@mapsoft.co.yu
? Faculty of Civil Engineering, University of Belgrade, Serbia and Montenegro - draganm@grf.bg.ac.yu
Commission IV, WG TV/6
KEY WORDS: Photogrammetry, Architecture, Cultural Heritage, Reconstruction, Softcopy, Close Range, Digital
ABSTRACT:
This paper evaluates advantages of application of digital photogrammetry for the purposes of production of technical documentation for
the objects under protection, comparing it with the classical photogrammetric procedures. Based on gained experiences, paper reviews
procedures for the completely digital production of technical documentation. Process of making technical documentation is divided in
two logical stages. First stage comprises of photogrammetric recording, necessary field measurements and production of archive
documentation. Archive documentation is in completely digital form and it includes: geometrically rectified photogrammetric photos,
data on control points, parameters of exterior orientation for all photos and digital orthophotos as a preliminary source of geometric
information. Second stage involves the production of detailed documentation with data describing object geometry such as: floor plans,
facades, sections, etc, by using suitable CAD tools. Considering that this constitutes the most complicated and the most expensive part of
making technical documentation, this stage is done when needed. Proposed method will be illustrated in paper by using experiences
gained on projects of making technical documentations for objects of historical and cultural heritage for the towns of Kragujevac (Serbia
and Montenegro) and Banja Luka (Republic of Srpska).
1. INTRODUCTION
Application of photogrammetry in cultural heritage and
protection of objects with high architectural value has a long
tradition. Classical photogrammetry had been also used for
these tasks, but it can be considered as slow and expensive
technique for production of technical documentation. With
application of contemporary methods of digital photogrammetry
new possibilities arise for faster, cheaper and more flexible
procedure, completely based on digital technique.
2. RESPECT FOR THE CULTURAL HERITAGE
Environments with proper respect to own hystorical and cultural
heritage succeeded in their efforts to provide appropriate
photogrammetric documentation (Kuipers, 1997). Some of them
got even further and they are now dealing with problems of
establishing information systems on cultural heritage (Potsiou et
al. 1992; Bartolotta et al., 2000; Heine, 1999; Kólbl, 2000).
These systems are not just about technical aspects of cultural
heritage protection but they are also enabling high level of
information technology application in this area (3D
visualization, virtual models, data distribution via Internet, etc).
Unfortunately, some societies have not finished or even started
this process. In spite of invaluable cultural value of many
objects, many of them have no technical documentation which
will serve as important information source for later rebuilding
or reconstruction. At the other hand, typical phenomenon is the
production of technical documentation immediately before
rebuilding or reconstruction, when the object is in the worst
condition and the time for high-quality documentation
production is very short. Absurdity lies in the fact that very
often amount of the money spent in such cases is higher than in
“regular” production.
So, relation to cultural-historical heritage depends not just on
available finances, but on condition and organization of works
in cultural heritage in certain environment. Timely production
of technical documentation by using photogrammetry is the
example which illustrates the importance of good organization.
Authors of this paper support the idea that procedures of
making technical documentation on geometric condition of
objects with high cultural value should be standardized and
works should be long-term planned.
3. PHOTOGRAMMETRIC PRODUCTION OF
CLASSICAL TECHNICAL DOCUMENTATION (IN
ANALOG FORM)
Photogrammetric production of technical documentation in
classical, analogue form assumes traditional procedures, that is:
* [mage capturing on glass plates or film;
e Determination of control points by standard surveying
methods;
e Graphical stereorestitution of facades, sections, floor
plans and other content in appropriate scale;
e Archiving of complete documentation in analogue
form.
It can be said that these were standard photogrammetric
procedures for production of technical documentation at the
time when analogue and analytical photogrammetry were
dominant. As such, it represented compulsory content of every
photogrammetric course dealing with application of
photogrammetry in cultural heritage protection.
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