Combination of Manual, Geodetic and Photogrammetric Measurements ... 
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2.2 Data Acquisition 
Figure 4: Acquired and digitally rectified image 
The knowledge of the planned sections is required during the data acquisition phase in the field. For some techniques it is 
recommended to mark the section lines through the object and the points of special interest on it using a non-permanent technique 
(like simple chalk) at the building. This can be done well using rotating lasers. This short-time signalization at least at the easily 
accessible parts of the object accelerates the manual and tacheometric measurements. The short-time points are also of high value 
during the image acquisition phase, because they show the camera operator the parts of special interest. The signals support the 
photogrammetric restitution, especially the bundle block adjustment, as these signals may be used as tie points and make sure, that 
the required parts are processed during the restitution process. In the stereo photogrammetric restitution they are well suited as start 
points for the drawing of the sections. This short-time signals may be interpreted as a special form of communication between 
architectural researcher and photogrammetric operator (Wiedemann et al., 1999). 
In a briefing before the measurement campaign and in daily briefings at the object 
during the campaign the level of details has to be discussed. It has to be adapted 
to the questions to be answered by the measurements, the planned forms and 
scales of documentations and last but not least the available resources. It is the 
main task of the campaign manager to distribute the limited personal and 
technical resources during the limited time of the campaign to achieve a maxi 
mum amount of useable output. 
2.3 Restitution and Data Collection 
It has to be decided in which form the collected data should be merged. The 
traditional 2D way is the data collection in paper form, using original manual 
measurement plans and sketches, positives of all acquired images and plots of the 
tacheometric and photogrammetric results. In this case, all projection planes (one 
per view or section) have to be determined and defined exactly in a post 
campaign briefing. 
In a modern technological environment it should be possible to keep the 3D data 
in 3D and to determine conjunction points in raw 2D data to merge them with the 
3D data. It may be useful to determine a planar similarity transformation between 
the data acquisition coordinate system, which was defined during the network 
adjustment, and an optimized storage system. At least one axis of this storage 
systems should be parallel to the main façade of the object. By this transformation 
the Z-values (heights) will only be shifted, because the orientation of both 
systems is oriented parallel to plumb lines. Hypertext documents or a data base 
may be compiled to integrate all available forms of data representations into a 
common digital data format (Breden, 2001). 
2.4 Data Analysis and Presentation 
After the data collection it is the task of the architectural researcher to do the data 
analysis. The photogrammetrist may contribute by delivering data on gaps 
detected during the data analysis. Here the data storage capacity of metric images 
is of high value. 
Figure 5: Manual measurements