Topic: solar

       Note: see also the corresponding keyword solar for additional references.

       r.horizon                                                    Computes  horizon  angle  height  from  a  digital elevation
                                                                    model.

       r.sun                                                        Solar irradiance and irradiation model.

       r.sunhours                                                   Calculates solar elevation, solar azimuth, and sun hours.

       r.sunmask                                                    Calculates cast shadow areas from sun position and elevation
                                                                    raster map.

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       © 2003-2016 GRASS Development Team, GRASS GIS 7.0.3 Reference Manual