[GRASS-user] Break lines in vector A at locations of points in vector B

[Patton, Eric (NRCan/RNCan)]

Hi,

I have two vector maps, vector A is a line vector representing coastline, and vector B is vector points which are the vertices of vector A. Is there a way to split vector A into line segments using vector B as breakpoints? 

v.edit tool=break kind of does this, but seems to want coordinates given one at a time. I have hundreds of thousands of points, and this doesn't seem an efficient way of doing it. 

Thanks,

~ Eric.