Full text: Proceedings, XXth congress (Part 3)

   
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International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Vol XXXV, Part B3. Istanbul 2004 
PLANIMETRIC RESULTANT 
  
  
  
  
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Discrepancy in X (Meters) 
Figure 6: Special Visualization of planimetric discrepancies in 
the region of small buildings. 
8. CONCLUSION AND RECOMENDATION 
The results obtained in this research show that the methodology 
presented for the 3D monorestitution of buildings with the 
integration of laser scanner data and small-format digital 
images is viable and makes it possible to obtain the altimetric 
and planimetric accuracy needed to carry out tridimensional 
vector mappings in the scale of 1/2000. In the experiments 
conducted, 100% of the points tested presented planimetric 
discrepancies below 0.8 of the meter. The proposed 
methodology may be an alternative to obtain information about 
the terrestrial surface, considering the operational facility 
existing in the monorestitution and popularization of small- 
format digital cameras. Currently, the dependency on laser 
scanner survey may be seen as the main disadvantage to apply 
the proposed methodology. Research is being conducted aiming 
at automatizing the process by developing mathematical 
algorithms that improve the selection of scanner laser points 
defining the contours of the buildings. The utilization of low- 
cost and small-format digital cameras with higher resolution 
will increase the performance of the proposed methodology. 
The utilization of images with higher spatial qualities will lend 
more precision to the identification and reading of point details, 
thus increasing the accuracy of the proposed methodology. The 
dimension of the area covered by an image taken with a small- 
format camera is an important operational disadvantage, when 
compared with conventional photogrammetric cameras. In the 
future, this disadvantage will be eliminated with the 
development and utilization of sensors with higher resolution 
based on CMOS technology. 
9. REFERENCES 
ACKERMANN, F. Airborne Laser Scanning for Elevantion 
Models. Geomatics Info Magazine, V. 10, p. 24-25, 1996. 
AXELSSON, P. Processing of Laser Scanner Data — 
Algorithms ^ and applications. — ISPRS Journal of 
Photogrammetry & Remote Sensing. V. 54, p. 138-147, 
1999, 
BALTSAVIAS, E. P. A Comparison Between Photogrammetry 
and Laser Scanning. ISPRS Journal of Photogrammetry & 
Remote Sensing. V. 54, p. 83-94, 1999. 
DOUGLAS, D. H., PEUCKER, T. K.. Algorithms for the 
Reduction of the Number of Points Required to Represent a 
Line or Its Caricature. The Canadian Cartographer. V. 10, n. 
2, p. 112-122, 1973. 
HABIB, Ayman F.; SHIN, S. W.; MORGAN, M. F. New 
approach for calibrating off-the-shelf digital cameras. In: 
PHOTOGRAMMETRIC COMPUTER VISION - PCV02. 
September 9-13, 2002. Graz, Austria. Proceedings... 
Graz[s.n], Part A. 
HABIB, A. F., MORGAN, M. F..Small Format Digital Cameras 
for Mapping Application: Calibration and Stability Analysis. In: 
NOVOS DESENVOLVIMENTOS EM CIENCIAS 
GEODESICAS 2003, Curitiba: Universidade Federal do 
Paraná, 2003. p. 03-26, (Série em Ciéncias Geodésicas, v.3). 
MACHADO, A. M. MITISHITA, E. SANTOS, R..L., 
BARBOSA, F. Verify the stability of the calibration parameters 
of the small format digital camera Sony DSC-F717. In: NOVOS 
DESENVOLVIMENTOS EM CIÉNCIAS GEODÉSICAS 
2003, Curitiba: Universidade Federal do Paraná, 2003. p. 03- 
26, (Série em Ciéncias Geodésicas, v.3). 
MAKAROVIK, B. Digital Mono-Plotters. LT.C. Journal, v. 
1, p. 101-122, 1973. 
MITISHITA, Edson A. Digital monorestitution of the 
airphotos integrated with computer aided design CAD for 
applications in forestry mapping. Curitiba, 1997.  Tese 
(Doutorado em Engenharia Florestal) - Setor de Ciéncias 
Agrárias, Universidade Federal do Paraná. 
   
  
  
   
  
   
     
   
    
    
   
   
   
   
   
     
     
   
   
  
    
   
   
   
   
   
   
   
   
   
     
     
   
   
    
   
   
   
   
   
     
  
 
	        
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