3. EXPERIMENTAL RESULTS 
Figure 2 to figure 6 show the five images respectively 
The experimental includes a real data test covering an in which extracted coastlines are superimposed. A 
offshore sand bar (Wai-San-Ting) to the west coast of historical target image shown in figure 7 for change 
Taiwan. The size of the sand bar is about 20km*20km. detection was acquired in 1986. The sampling time 
Five images were acquired in the first quarter of 1994 and the associated tide measurements are indicated 
and are used as reference images. in table1. 
  
Figure 2. SPOT Image A,1994/01/03 
  
Figure 3. SPOT Image B, 1994/01/11 : Figure 5. SPOT Image D,1994/03/04 Re 
120 
International Archives of Photogrammetry and Remote Sensing. Vol. XXXI, Part B7. Vienna 1996