Patrice, Daniel,
Thank you for your commments - it shaded some light on the subject.
Regards,
André Mano
2012/2/5 Patrice Dumas
> On Sun, Feb 05, 2012 at 07:22:29AM -0200, Daniel Victoria wrote:
> > Hi Andre,
> >
> > On raster algebra, operations using null will return null while
> operation
On Sun, Feb 05, 2012 at 07:22:29AM -0200, Daniel Victoria wrote:
> Hi Andre,
>
> On raster algebra, operations using null will return null while operations
> with 0 behaves like expected. Ex:
> 12 x null = null
> 12 x 0 = 0
Also means do not behave the same on NULL, for example when using r.univa
Hi Andre,
On raster algebra, operations using null will return null while operations
with 0 behaves like expected. Ex:
12 x null = null
12 x 0 = 0
Null is interesting to use on areas you don't have / want to represent,
like an ocean...
Hope it helps
Daniel
On Feb 5, 2012 12:03 AM, "ALT SHN" wro
Hello,
I have a technichal doubt. I used* v.to.rast.constant *to tranform a line
vector layer to raster. This meant i have a raster with NULL values.
The output raster is to be used in map algebra operations.
So my question is: Is it advisable to set the Null cells to 0? I know
r.calc works with
