International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Vol XXXV, Part B3. Istanbul 2004 
  
0.394 meters at horizontal plane and 0.577 meters at vertical 
axis. That means a 3-pixels of accuracy could be obtained using 
the simplest stereo-matching method. It demonstrates the 
potential and usefulness of an interactive scheme for 3D 
building modeling. However, a sophisticate stereo matching 
algorithm may get a better result. 
4. CONCLUSIONS 
This paper presents a novel method for geometrical building 
modeling based on an interactive scheme. The proposed 
Split-Merge-Shape method that adopts visible 3D roof-edges for 
building modeling is innovative. The major features of the 
proposed method are: (1) by means of the SMS technology, the 
integration of topographic mapping with 3-D building modeling 
is possible, (2) it avoids the hardware cost in 
stereo-measurement. A cost-effective environment could be 
established for 3-D mapping, and (3) it is proven to be robust, 
efficient, and with high accuracy. 
5. ACKNOWLEDGEMENT 
This work was partially supported by the National Science 
Council, Taiwan, under project‘ number | NSC 
89-2211-E-008-086. The authors like to thank Prof. S.C. Wang, 
National Cheng-Kung University for providing the test data. 
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