nd. 
  
    
A Az 
   
  
   
    
  
       
  
  
BIN NS A, / ov UN) Waterstram Eau 
s \ ed. Radius 104m] (Road network) Nation pu 
} hy / od [9] i E] 
id > Nesting ae (1364) BE Radius 132m) 
         
COT Nesting site 1994) 
Figure 3. Distribution of existing nests and road Figure 5. Distribution of existing nests with 1320 m 
networks with 104 m buffer in Kushiro Wetland. buffer in Kushiro Wetland. 
  
  
UM] Water stream (19921999) 
CE Radius 364m] (Residential site) 
CE] Nesting sit (1994) 
   
ES Wetlands ara 
A E Nesting area (1994) 
  
  
Figure 4. Distribution of existing nests and buildings Figure 6. Distribution of existing nests and the Kushiro 
with 364 m buffer in Kushiro Wetland. Wetland area. 
579 
International Archives of Photogrammetry and Remote Sensing. Vol. XXXI, Part B4. Vienna 1996