R.cost multiple destinations

R.cost multiple destinations

I am trying to calculate the optimal route from one archaeological site to multiple sites. I already have the r.cost raster. My question is if I can use r.drain to multiple destination points.

The GRASS GIS 6.4 r.drain manual page shows:

coordinate=x,y[,x,y,… ] Map coordinates of starting point(s) (E,N)

so just enter your coordinates as:

r.drain coordinate=x1,y1,x2,y2,x3,y3…

or you can save the coordinates as a vector and use parameter vector_points. These parameters are renamed in GRASS 7, check the manual.