[GRASSLIST:818] Re: Eliminating negative values on raster image

[Glynn Clements]

Tim De Chant wrote:

> I have a raster map with negative values in it that I'd like to  
> eliminate.  I know the values should not be negative, and I'd like to  
> change any negative value to zero.  I have looked through the map  
> calculator (r.mapcalc) to see if I could create an expression that  
> would create such a map but haven't had any luck.  Could anyone help  
> me out with writing one?  Thanks.

	r.mapcalc "new = max(old, 0)"

-- 
Glynn Clements <glynn at gclements.plus.com>