- 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
-
calculates univariate statistics from a GRASS raster map
- r.water.outlet
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Watershed basin creation program.
- r.watershed
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Watershed basin analysis program.
- r.what
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Queries raster map layers on their category values and category labels.
- r3.in.ascii
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Convert a 3D ASCII raster text file into a (binary) 3D raster map layer
- r3.in.v5d
-
import of 3-dimensional Vis5D files (i.e. the v5d file with 1 variable and 1 time step)
- r3.info
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Outputs basic information about a user-specified 3D raster map layer.
- r3.mapcalc
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r3.mapcalc
- r3.mask
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Establishes or removes the current working 3D raster mask.
- r3.mkdspf
-
- r3.null
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Explicitly create the 3D NULL-value bitmap file.
- r3.out.ascii
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Converts a 3D raster map layer into an ASCII text file
- r3.out.v5d
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Export of GRASS 3D raster file to 3-dimensional Vis5D file.
- r3.timestamp
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print/add/remove a timestamp for a 3D raster map
- raster
-
Geographic Resources Analysis Support System, commonly referred to as GRASS,
is a Geographic Information System (GIS) used for geospatial data management
and analysis, image processing, graphics/maps production, spatial modeling,
and visualization. GRASS is currently used in academic and commercial settings
around the world, as well as by many governmental agencies and environmental
consulting companies.
- raster3D
-
Geographic Resources Analysis Support System, commonly referred to as GRASS,
is a Geographic Information System (GIS) used for geospatial data management
and analysis, image processing, graphics/maps production, spatial modeling,
and visualization. GRASS is currently used in academic and commercial settings
around the world, as well as by many governmental agencies and environmental
consulting companies.
- sql
-
SQL support for GRASS.
- v.buffer
-
Create a buffer around features of given type (areas must contain centroid).
- v.build
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Creates topology for GRASS vector data.
- v.build.all
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v.build.all
- v.build.polylines
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Build polylines from lines.
- v.category
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Attach, delete or report vector categories to map geometry.
- v.clean
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Toolset to clean vector topology.
- v.convert
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Imports older versions of GRASS vectors.