[Coral-List] Mapping procedure

Marianne Gilbert marianne2 at ekno.com
Thu Aug 7 17:10:18 EDT 2003

Hi fellow listers,

I am looking for anyone who has a good procedure for mapping shallow 
coral reefs using GPS and single-beam sonar.  We are trying to 
roughly map depth profiles of reefs around Samoa.  We have an Eagle 
Seacharter that can record both depth profiles and GPS coordinates.  
We are planning to enter the data into MapInfo.  

It would be a lot easier/cheaper for us if we can do this using 
Polynesian canoes instead of a motor boat.  I tried mounting the 
probe on a canoe and it works but wind and currents can be a problem 
when trying to travel in straight lines...  Any advice from people 
who did similar things would be greatly appreciated! 

Thank you!


Marianne Gilbert
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