[GRASS-user] Divide raster map using vector line

[Rich Shepard]

On Tue, 6 Jun 2017, Helmut Kudrnovsky wrote:

> What about?:
>
> -g.region by your raster
> -v.in.region to get a vector area of your raster
> -split the vector area by your road
> -Add a new attribute column and give 1 for the area which shouldn't change
> and the other the number which you want to divide
> -v.to.rast by attribute
> -r.mapcalc with some if statement

Helmut,

   I thought there would be a need to transform maps from raster to vector
(or the other way) but I did not work out the appropriate sequence as you
have. This reflects my relative lack of experience doing complex processing
with grass.

Thank you very much,

Rich