- r.out.ppm
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Converts a GRASS raster file to a PPM image file at the pixel resolution of the CURRENTLY DEFINED REGION.
- r.out.ppm3
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Converts 3 GRASS raster layers (R,G,B) to a PPM image file at the pixel resolution of the CURRENTLY DEFINED REGION.
- r.out.tiff
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Exports a GRASS raster file to a 8/24bit TIFF image file at the pixel resolution of the currently defined region.
- r.param.scale
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Extracts terrain parameters from a DEM. Uses a multi-scalar approach by taking fitting quadratic parameters to any size window (via least squares)
- r.patch
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Creates a composite raster map layer by using known category values from one (or more) map layer(s) to fill in areas of "no data" in another map layer.
- r.plane
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Creates raster plane map given dip (inclination), aspect (azimuth), and one point
- r.profile
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Outputs the raster map layer values lying on user-defined line(s).
- r.proj
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Re-project a raster map from one location to the current location.
- r.quant
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This routine produces the quantization file for a floating-point map.
- r.random
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Creates a raster map layer and vector point map containing randomly located sites.
- r.random.cells
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Generates random cell values with spatial dependence.
- r.random.surface
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Generates random surface(s) with spatial dependence.
- r.reclass
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Creates a new map layer whose category values are based upon the user's reclassification of categories in an existing raster map layer.
- r.reclass.area
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Reclasses a raster map greater or less than user specified area size (in hectares)
- r.recode
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Recode raster maps.
- r.region
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Sets the boundary definitions for a raster map.
- r.regression.line
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Calculates linear regression from two raster maps: y = a + b*x
- r.report
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Reports statistics for raster map layers.
- r.resamp.rst
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Reinterpolates and computes topographic analysis from input raster file to a new raster file (possibly with different resolution) using regularized spline with tension and smoothing.
- r.resample
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GRASS raster map layer data resampling capability.
- r.rescale
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Rescales the range of category values in a raster map layer.
- r.rescale.eq
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Rescales histogram equalized the range of categoryvalues in a raster map layer.
- r.ros
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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.
- r.series
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Makes each output cell value a function of the values assigned to the corresponding cells in the input raster map layers.
- r.shaded.relief
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Creates shaded relief map from an elevation map (DEM).
- r.slope.aspect
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Generates raster map layers of slope, aspect, curvatures and partial derivatives from a raster map layer of true elevation values. Aspect is calculated counterclockwise from east.
- r.spread
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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. It optionally produces raster maps to contain backlink UTM coordinates for tracing spread paths.
- r.spreadpath
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Recursively traces the least cost path backwards to cells from which the cumulative cost was determined.
- r.statistics
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Category or object oriented statistics.
- r.stats
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Generates area statistics for raster map layers.
- r.sum
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Sums up the raster cell values.
- r.sun
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Computes direct (beam), diffuse and reflected solar irradiation raster maps for given day, latitude, surface and atmospheric conditions. Solar parameters (e.g. sunrise, sunset times, declination, extraterrestrial irradiance, daylight length) are saved in a local text file. Alternatively, a local time can be specified to compute solar incidence angle and/or irradiance raster maps. The shadowing effect of the topography is optionally incorporated.
- r.sunmask
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Calculates cast shadow areas from sun position and DEM. Either A: exact sun position is specified, or B: date/time to calculate the sun position by r.sunmask itself.
- r.surf.area
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Surface area estimation for rasters.
- r.surf.contour
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Surface generation program from rasterized contours.
- r.surf.fractal
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GRASS module to create a fractal surface of a given fractal dimension. Uses spectral synthesis method. Can create intermediate layers showing the build up of different spectral coefficients (see Saupe, pp.106-107 for an example of this). Use this module to generate naturally looking synthetical elevation models (DEM).
- r.surf.gauss
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GRASS module to produce a raster map layer of gaussian deviates whose mean and standard deviation can be expressed by the user. It uses a gaussian random number generator.
- r.surf.idw
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Surface interpolation utility for raster map layers.
- r.surf.idw2
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Surface generation program.
- r.surf.random
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Produces a raster map layer of uniform random deviates whose range can be expressed by the user.
- r.texture
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Generate images with textural features from a raster map
- r.thin
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Thins non-zero cells that denote linear features in a raster map layer.
- r.timestamp
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Print/add/remove a timestamp for a raster map.
- r.to.vect
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Converts a raster map into a vector map layer.
- r.topidx
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Creates topographic index, ln(a/tan(beta)), map from elevation map.
- r.topmodel
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Simulates TOPMODEL which is a physically based hydrologic model.
- r.transect
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Outputs raster map layer values lying along user defined transect line(s).
- r.univar
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Calculates univariate statistics from the non-null cells of a raster map.
- r.univar.sh
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calculates univariate statistics from a GRASS raster map
- r.water.outlet
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Watershed basin creation program.