[GRASS-user] Selecting a sector of the viewshed

[AhmadKhaled]

Hi,

I have used the r.los function to calculate the viewshed from a point in the
map. The result is a subset of a circle around that point. Now, I want to
select a sector of this circle which has an angle of 45 (or whatever), and
nullify the rest of the circle. Any idea on what is the best way to do that?

Thanks in advance,
Ahmad
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