[processing] add GRASS modules for Wildfire analysis

python/plugins/processing/algs/grass/description/r.ros.txt

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+r.ros
+r.ros - Generates three, or four raster map layers showing 1) the base (perpendicular) rate of spread (ROS), 2) the maximum (forward) ROS, 3) the direction of the maximum ROS, and optionally 4) the maximum potential spotting distance.
+Raster (r.*)
+ParameterRaster|model|Name of raster map containing fuel MODELs|True
+ParameterRaster|moisture_live|Name of raster map containing LIVE fuel MOISTURE (%)|True
+*ParameterBoolean|-s|Also produce maximum SPOTTING distance (-s)|False
+*ParameterRaster|moisture_1h|Name of raster map containing the 1-HOUR fuel MOISTURE (%)|False
+*ParameterRaster|moisture_10h|Name of raster map containing the 10-HOUR fuel MOISTURE (%)|False
+*ParameterRaster|moisture_100h|Name of raster map containing the 100-HOUR fuel MOISTURE (%)|False
+*ParameterRaster|velocity|Name of raster map containing midflame wind VELOCITYs (ft/min)|False
+*ParameterRaster|direction|Name of raster map containing wind DIRECTIONs (degree)|False
+*ParameterRaster|slope|Name of raster map containing SLOPE (degree)|False
+*ParameterRaster|aspect|Name of raster map containing ASPECT (degree, anti-clockwise from E)|False
+*ParameterRaster|elevation|Name of raster map containing ELEVATION (m) (required with -s)|False
+OutputRaster|output|Name of raster map to contain results (several new layers)

python/plugins/processing/algs/grass/description/r.spread.txt

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+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