Structured and Integrated Technical Documentation on Cultural Heritage - Approach in Slovenia 
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4. SPECIFIC TECHNICAL DOCUMENTATION 
Nowadays, it is more and more important that photogrammetric results are presented in attractive ways. It is especially useful to 
combine 3D model of a monument with the 3D model ot the surrounding terrain. Of course, the accuracy of the monument model is 
usually much more accurate in detailed as the surroundigs (example of Lake of Bled). Another example is presented here to show the 
value of archive photo for restoration purpose (fresco on church of St. Kacian). 
Lake of Bled with island 
On the western edge of the Julian Alps lies Bled, with its picturesque island in the middle of the lake. The town and its surroundings 
have been an international summer resort for centuries. A small island in the lake has some important cultural heritage building (a 
church is built on archaeological site) thus a quality technical documentation was needed. A 3D model of topography of the island 
and of it’s buildings has been produced from geodetic and photogrammetric survey (Figure 6). Original documentation was prepared 
in AutoCAD r 14 and then transformed into the VRML format. A 3D model of the complete lake and it’s surrounding was produced 
from the existing topographical data (Digital Terrain Model with 25 m grid cell, Central database on buildings, additional 
photogrammetric survey from photos of Cyclical Aerial Survey of Slovenia). 
Figure 6: 3D model of Island of Bled with Lake and the terrain around lake 
Fresco on church of St. Kacian 
The painting is positioned in the exterior (on a facade) of the church and is thus exposed very much to atmospheric circumstances. 
The fresco needs a thorough restoration as the colors and many details are rapidly fading. Photos of fresco from the year 1936 were 
found in the archive, where all details are very clearly visible (Figure 7). Photogrammetric survey was accomplished in year 2000 
and a very accurate orthophoto map was produced (resolution of 2 mm in nature). Then, the archive black and white photo was 
transformed into the same coordinate system as new orthophoto, using some well defined points. With superimposition of the both 
photos, the restaurator could interpret very well the vanished details. 
5. CONCLUSIONS 
Photogrammetric survey and production of technical documentation on historic buildings, monuments and sites is not a cliche work. 
Every task and project is unique and needs proper approach, as any monument has it’s own history, location and condition. However, 
it is necessary to structure documentation in order to have better review and to avoid the confusion. Data and results could be 
integrated as well. This means that old and new documents could be merged, and doumentation could be produced in different levels 
of details. Modem technologies enable very attractive visualization of the results, but one should not forget that the main task of a 
photogrammeter is to produce an accurate and reliable result which serves for many purposes of monuments restoration and 
conservation.