r.viewshed Computes the viewshed of a point on an elevation raster map. Raster (r.*) QgsProcessingParameterRasterLayer|input|Elevation|None|False QgsProcessingParameterPoint|coordinates|Coordinate identifying the viewing position|0.0,0.0|False QgsProcessingParameterNumber|observer_elevation|Viewing elevation above the ground|QgsProcessingParameterNumber.Double|1.75|True|None|None QgsProcessingParameterNumber|target_elevation|Offset for target elevation above the ground|QgsProcessingParameterNumber.Double|0.0|True|None|None QgsProcessingParameterNumber|max_distance|Maximum visibility radius. By default infinity (-1)|QgsProcessingParameterNumber.Double|-1.0|True|-1.0|None QgsProcessingParameterNumber|refraction_coeff|Refraction coefficient|QgsProcessingParameterNumber.Double|0.14286|True|0.0|1.0 QgsProcessingParameterNumber|memory|Amount of memory to use in MB|QgsProcessingParameterNumber.Integer|500|True|1|None *QgsProcessingParameterBoolean|-c|Consider earth curvature (current ellipsoid)|False *QgsProcessingParameterBoolean|-r|Consider the effect of atmospheric refraction|False *QgsProcessingParameterBoolean|-b|Output format is invisible = 0, visible = 1|False *QgsProcessingParameterBoolean|-e|Output format is invisible = NULL, else current elev - viewpoint_elev|False QgsProcessingParameterRasterDestination|output|Intervisibility