[GRASS-user] How to rescale an aspect map

[Daniel Victoria]

No sure if I understood what you asked but here we go.

First I'd rescale (r.rescale) the aspect to the desired directions.
Take a look at the r.slope.aspect man page [1] to see what the aspect
values represent
Then I'd rescale the directions map to the weights you mention.

Hope it helps
Daniel

[1] - http://grass.osgeo.org/gdp/html_grass64/r.slope.aspect.html

On Wed, Feb 8, 2012 at 7:10 PM, leonidas <leonidas_liakos at yahoo.gr> wrote:
> I need to rescale an aspect map in a scale 0-255 where North = 0 and SE=255.
> Finally I need to assign weights as follow:
> 0.02    N
> 0.02    NE
> 0.12    E
> 0.34    SE
> 0.20    S
> 0.18    SW
> 0.08    W
> 0.03    NW
>
> Thank you!
>
>
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