[GRASS-dev] using slope/aspect functions inside our module

[Glynn Clements]

"Carlos \"Guâno\" Grohmann" wrote:

> Interesting.
> Why r.slope.aspect uses
> 
> dx = ... / (4 * ewres);
> 
> while r.shaded.relief uses
> 
> dx = ... / (8 * ewres);
> 
> ??

Oops. It should be 8; the ewres/nsres values are actually the
distances between the centres of the top/bottom rows and left/right
columns in the 3x3 window, which are two rows/columns apart. IOW, the
4*ewres should have been 4*(2*ewres) = 8*ewres, ditto for nsres.

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