[GRASS-user] calculate height above ground for a specific vertical angle of view

[Moritz Lennert]

On 23/06/17 08:51, frank wrote:
> Le 21/06/2017 à 12:44, Frank David a écrit :
>> Hello,
>>
>> I have calculated viewshed maps from one point of view at 2m height
>> increasing the altitude above topography from 0 to 250m. So with
>> r.series i can calculate the total visible height (sum of True in meter)
>> or the total invisible height(sum of false in meter), or the vertical
>> visible angle (angle-mode).
>>
>> I want now calculate the visible height (in metres) according to a
>> specific vertical angle of view from my point of view.
>>
>> Witch method I could use to get effectively that result ?
>>
>> Thanks !
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>
> I think I have found the way to do it, if I find the trick to count the
> number of raster where values are inside a range limit (-inf,myTarget).
> Because I have one raster of vertical angle by meter.
> I've tried r.series with range but I'have not found the way to count the
> raster number processed in the range limit
> Is anyone have an idea ?

r.series [...] method=count range=-inf,myTarget ?

Moritz