[GRASS-user] Meaning of 'Prevalent Orientation' in r.basin

[Rich Shepard]

On Fri, 22 Jun 2012, Margherita Di Leo wrote:

> The prevalent orientation is defined as the orientation of the directing
> vector. The directing vector is a segment which joins the basin's
> barycenter and the outlet. The orientation is given by the formula:
> prevalent_orientation = math.atan(delta_y/delta_x)
>
> where
>
> delta_x = abs(float(basin_east) - east)
> delta_y = abs(float(basin_north) - north)
>
> being basin_east and basin_north the coordinates of barycenter and east and
> north those of the outlet.

madi,

   Thanks for clarifying. I had not before seen this parameter in any work
I've did so your explanation really helps.

Regards,

Rich

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