[GRASS-user] square buffeer

[Martin Wegmann]

Hello, 

I am looking for a way to create a square buffer for a point vector so that  
each point is in the end the centroid of a square with defined side length.

I though about r.mapcalc statements to grow north-south and west-east and then 
somehow create an area from this square. But I have no idea how to do it 
without a lot of hand-work.  

Any idea how to achieve that? Or hints where to find relevant documents.

Martin