[GRASSLIST:5870] Looking for Advice on Buffering

[Nathan Wales]

I have been working with Grass 6.0 to try to output elevation values from a 
raster map at specific intervals from coordinates. I have been sucessful at 
getting coordinates into Grass. However, I have not found a way to create 
buffers or concentric circles that overlap and maintain the centroid 
attribute. I want to have the circles in miles (like in the raster buffer) 
rather than map units (like in the vector buffer). I am willing to try to 
write code for a solution, but I have limited experience. 

Does anyone have a suggestion for how I should approach this task?

Thanks for taking the time to read this message, and for briefly thinking 
about it. 

Cheers,
Nathan