[GRASSLIST:9107] Mask

[Atif Rajan]

Dear readers,

Can some help me with the following please:

GRASS6.0  OS: Suse 9.1

I have a Grass location and a Mapset with a raster(MAP_rast) and a vector 
(MAP_vect)
I converted the vector to raster using v.to.rast (MAP1)
I generated a surface as follows:
d.rast MAP1
g.region res=500
r.surf.contour -f input=MAP1 output=MAP_surf

What I am trying to do is to generate this surface only where there are 
contours and not beyond. How do I do this?

thank you.

Atif