r.spread r.spread - Simulates elliptically anisotropic spread on a graphics window and generates a raster map of the cumulative time of spread, given raster maps containing the rates of spread (ROS), the ROS directions and the spread origins. Raster (r.*) ParameterRaster|max|Name of raster map containing MAX rate of spread (ROS) (cm/min)|True ParameterRaster|dir|Name of raster map containing DIRections of max ROS (degree)|True ParameterRaster|base|Name of raster map containing BASE ROS (cm/min)|True ParameterRaster|start|Name of raster map containing STARTing sources|True *ParameterBoolean|-s|For wildfires: consider SPOTTING effect (-s)|False *ParameterRaster|spot_dist|Name of raster map containing max SPOTting DISTance (m) (required with -s)|False *ParameterRaster|w_speed|Name of raster map containing midflame Wind SPEED (ft/min) (required with -s)|False *ParameterRaster|f_mois|Name of raster map containing fine Fuel MOISture of the cell receiving a spotting firebrand (%) (required with -s)|False *ParameterNumber|least_size|Basic sampling window SIZE needed to meet certain accuracy (default 3). Options: 3,5,7,9,11,13,15|3|15|3 *ParameterNumber|comp_dens|Sampling DENSity for additional COMPutin (range: 0.0 - 1.0 (default 0.5))|0|1|0.5 *ParameterNumber|init_time|INITial TIME for current simulation (0) (min)|0|None|0 *ParameterNumber|lag|Simulating time duration LAG (fill the region) (min)|0|None|0 *ParameterRaster|backdrop|Name of raster map as a display backdrop|False OutputRaster|output|Name of raster map to contain OUTPUT spread time (min) OutputRaster|x_output|Name of raster map to contain X_BACK coordinates OutputRaster|y_output|Name of raster map to contain Y_BACK coordinates