r.horizon
r.horizon - Horizon angle computation from a digital elevation model.
Raster (r.*)
ParameterRaster|elevation|Name of input elevation raster map|False
ParameterNumber|direction|Direction in which you want to know the horizon height|0|360|0.0
ParameterNumber|maxdistance|The maximum distance to consider when finding the horizon height|0|None|10000
ParameterString|distance|Sampling distance step coefficient (0.5-1.5)|1.0
ParameterBoolean|-d|Write output in degrees (default is radians)|False
OutputRaster|output|Horizon