«odate 1998 
ge in large 
ly manner 
nstruction 
ing these 
and these 
and other 
nents. 
, requiring 
nformation 
jasts and 
y, Secure 
ontrol and 
lity of the 
m of the 
ith a GPS 
) for data 
nd other 
and a 
ymputer is 
s and for 
iner, main 
i, GPS Sa te llite 
— Offi ce z^sediment vessels. 
  
Figure 1 Concept Diagram of the Sy stem 
Internet 
  
  
  
  
    
VRML 
  
  
  
Ground 
Sea € 
Project O wner 
  
  
  
  
  
  
  
  
  
    
VRML 
  
  
  
<4» 
LAN 
  
  
  
  
  
  
  
  
Main Office - Branch Offices 
  
    
Monitor 
|| Echo Sounder 
      
  
Sounding System | 
    
  
  
  
som 
Eleciromag netic 
Compass 
  
  
  
  
  
office and branch offices. The processing software 
Is based on GIS that stores geographic data and 
layers of construction management information for 
Figure 2 Configuration Diagram of the Sy stem 
267 
each work to be shared and integrally managed. A 
language would allow 3D image processing on the 
Internet (VRML) is used to produce drawings and