Full text: New perspectives to save cultural heritage

CIPA 2003 XIX th International Symposium, 30 September - 04 October, 2003, Antalya, Turkey 
engineers for historical development, topography, vegetation, 
land use pattern, transportation network etc. (Duran, 2002). 
The GIS is a relatively new technology that joins the computer 
science advantages with the modern systems of capture of data, 
so that it allows the integration and the treatment of all type of 
information of a computer team, in a simple way on the part of 
any user that requires to work with this information. A GIS 
include software and hardware tools, and a group of procedures 
elaborated to facilitate capture, edition, administration, 
manipulation, analysis, modeling, representation and exit of 
spatial referenced and semantic data, to solve any type of 
planning, administration, storage, and so on information 
concerning problem (Hernan-Perez, 2001). 
With the advent of geographic information systems, a powerful 
method is available to store graphical and descriptive data with 
all their links. Digital photogrammetry and the GIS provide a 
group of advantages and benefits in the architectural tasks 
impossible to obtain with such an efficiency, velocity and 
economy by means of other procedures. 
5. CASE STUDY 
5.1. Photogrammetric Documentation of Opera House 
In this contribution, Opera House in Hannover (Germany) was 
choosed as a historical building (Fig. 1) and, eighteen photos 
that surround this building, which were taken by one of the 
Institute of Photogrammetry and Geoinformation’s staff in 
Hannover, were used. The images were taken with Olympus 
E10 digital camera with 2240x1680 geometric resolution and 9 
mm focal length. This camera produces RAW, TIFF and JPEG 
images, normal and automatic exposition, 4x zoom and black 
and white control. The camera has been calibrated, so it’s 
principle distance, radial and tangential distortion is known 
(Wiggenhagen, 2002). In addition to these images, an image 
map that shows cadastral situation of the building in tiff format 
was used as a base platform. 
Figure 1. The image of Opera House 
Photo Modeler software by EOS Systems Inc. was used for 
photogrammetric evaluation. The Canadian PhotoModeler 
Software Package is well known as a low cost 3D-measurement 
tool for architectural and archeological applications. It is a 
Windows based software that allows measurements and 
transforms photographs into 3D models. The image coordinates 
of corresponding points and control points were measured 
manually and the images were oriented automatically. After the 
facades of building was identified as a surface patches, the 
wireframe and photo-texture model were built up using the 
oriented images (Fig. 2 and Fig. 3). 
Figure 2. Wireframe Model of Building in Photo Modeler 
Afterwards, created 3D model of building was transferred to 3D 
DXF file to visualize and to relate with its attribute data in GIS. 
Figure 3. Photo-texture Model of Building Created by Photo 
Modeler 
5.2. Visualization and Querying of the 3D Model in GIS 
The 3D DXF file created in PhotoModeler is converted to SHP 
file format in ArcView. Base map with control points is 
imported to ArcView program. A georeferencing has to be done 
to make association between base map and 3D model to see 
them together in 3D scene. With the help of the TFW (world 
file for tiff image) file belongs to ArcView, base map is 
registered and transformed into same coordinate system with 
3D model.
	        
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