CIPA 2003 XIX th International Symposium, 30 September - 04 October, 2003, Antalya, Turkey 
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system has been developed for laboratory conditions and needs 
to be adapted for use in on-site conditions. 
4.2.2 Optical System: ProCam 
The ProCam 3D-measurement sensor (ProCam, 2003) has been 
developed for use in industrial applications and is based upon 
photogrammetric principles. The following characteristics are 
relevant for its use in surveying building detail: 
robust handling 
a variety of pointers are available for measuring hidden 
points 
high-precision under manual use 
flexible application using so-called target panels 
Figure 5: ProCam measurement 
device with different pointers 
Figure 6: ProCam on-site 
The measurement sensor contains three integral CCD-cameras 
that measure a reference field of coded measurement points 
from which the position of the pointer is measured. So-called 
target panels, which can be placed freely in the room, can be 
used to establish an internal reference system for surveying 
building detail. The interchangeable pointers enable points 
which are hidden from, direct view to be measured. The 
equipment was developed for industrial use and is 
correspondingly robust and straightforward in its handling. A 
CAD-interface already exists. User-dependent interfaces are 
provided for integration into production processes in industry. 
The price-performance ratio of the industrial configuration is 
too low for applications in buildings and building conservation. 
Figure 7: Fland-held laser-scanner HLS (HLS, 2003) 
The step-up in efficiency in comparison to complex and time- 
consuming hand sketches would be considerable. 
5. FUTURE PROSPECTS: THE POTENTIAL 
APPLICATION OF SURVEYED DATA OF BUILDING 
DETAILS 
In addition to technical means of realisation, two further factors 
are decisive for the success and cost-efficiency of surveying 
building detail according to the techniques described: 
1. The integration of surveyed building detail within an 
overall building survey. The geometric data must be 
integrated consistently within the overall geometric 
building model, so that these are usable directly and do not 
need to be obtained via other systems. In this way the 
information can be made directly available to all project and 
planning participants. 
2. The building survey data captured must be adapted to fit the 
requirements of the users and trades. This applies primarily 
to data format and the form of its representation. This must 
be provided in a form that the individual participants can 
use and accept immediately within their own working 
methods. The surveying of building detail can only become 
cost-efficient once its value is recognised and its use 
becomes widespread. 
4.2.3 Hand-held laser-scanner 
So-called hand-held laser-scanners can be used for detail 
modelling. They are particularly suited to detail measurements 
because: 
like all laser-scanning approaches they can model surfaces 
at high-resolution, 
but unlike conventional scanning approaches are only 
suitable for small areas. 
This is exactly where optimum use can be made of the high 
visualisation-quality of the scanning approach: Critical points 
and especially complex details can be modelled exactly. For 
instance, for the modelling of intersections in roof trusses, for 
measuring capitals, sculptures etc. 
The positioning of the HLS laser-scanner head (Fig. 7) itself 
employs an electromagnetic tracker. This solution is developed 
for laboratory conditions but could be adapted for use in 
existing buildings and could eventually lead to a completely 
new solution for the 1:1 modelling of building details. 
6. BIBLIOGRAPHY 
D. Donath, F. Petzold, T. Thurow (2002): Planning relevant 
survey of buildings -starting point in the revitalization process 
of existing building - requirements, concepts, prototypes and 
visions. The CIPA International Archives for Documentation of 
Culture Heritage, Volume XVIII - 2001, pp. 565-572. 
HiBall-3100 (2003): HiBall-3100 Tracker, 
http/www. 3 rdtech. com/Hi B al 1. htm. 
HLS (2003): http://www.rsi.gmbh.de/hls_d.htm. 
IGD (2003): IrDA-Beacon Transmitter. Frauenhofer Institut für 
Graphische Datenverarbeitung. 
http://www.rostock.igd.fhg.de/~mmt 
Intersense (2003): http://www.isense.com. 
Leica (2003): http://www.leica-geosystems.com/ims/product/ 
ltd500.htm 
Niemeier, W. (2002): Ausgleichungsrechnung. De Gruyter 
Lehrbuch, Berlin 2002.