[GRASSLIST:306] Re: distance to raster line

[H Bowman]

> once again. I do have a line raster map (e.g. a raster map of roads), 
> and I need to generate a raster layer, where every pixel has the same ID 
> as the closest line (of the line raster). I am not sure if a combination 
> of the r.cost and r.drain commands can help. At least I dont see how to 
> do it.

possibly:

r.null map null=0
g.copy map,map1

then loop:
r.grow in=map1 out=map2
g.remove map1
g.rename map2,map1


?


good luck,
Hamish